Android simple page applicationJobs

Filtrér

Mine seneste søgninger
Filtrer ved:
Budget
til
til
til
Slags
Færdigheder
Sprog
    Job-status
    2,000 android simple page application jobs fundet, i prisklassen EUR

    I need someone to design a platform like Shopify, but small For example, it has a dashboard, multiple users, and a unified website for everyone

    €2112 (Avg Bid)
    €2112 Gns Bud
    86 bud

    I need an experienced developer who has proficiency in JavaScript, Node.js, and to update my site with Paypal integration. The objective is to provide payment options for our customers that include Credit Card, Debit Card, and Bank Transfer. Key Requirements: 1. Shop Page: Front basic design is in the image. Bootstrap 4 should be leveraged for the design of this page. It should feature a table of products with no images necessary. The product is in game money called diamonds, they can purchase 1500, 3000, 4500 etc.. 2. Paypal Integration: Seamlessly process payments through Paypal from the aforementioned payment methods - When user make the full purchase completley, he will automatically get the items in game, and a report should be updated in database(new table called pu...

    €160 (Avg Bid)
    €160 Gns Bud
    35 bud

    I'm looking for a proficient mobile app developer who can build an iOS application aimed at sharing information from professional consultation experts. The main feature of the app is to facilitate information dissemination by these experts. Key responsibilities: - Develop an iOS application from scratch - The app should serve as a platform for sharing expert professional consultation - Ensure smooth and effective information flow within the app Ideal Skill Set: - Expert in iOS app development - Past experience in designing similar information sharing applications - Understanding of user-friendly interfaces for efficient information transfer - Familiarity with industry-standard protocols for data security and privacy.

    €2397 (Avg Bid)
    €2397 Gns Bud
    70 bud

    I'm looking to find a developer who can create a simple yet effective landing page for my laundry collection business. The main goal of the landing page is to allow users to book a collection. Here's what I need: - User should be able to provide their contact details, preferred collection time, the type and quantity of laundry, and any specific instructions for the collection - A system for users to book and receive confirmation immediately - I require the users to ring our store to process their payment, so no online payment integration is needed this time. The ideal freelancer would have experience in creating booking landing pages and understand the user journey. Prior experience in e-commerce platforms would be a plus. Good understanding of user experi...

    €492 (Avg Bid)
    €492 Gns Bud
    110 bud

    As a client who's open to all innovative ideas, I'm seeking an experienced Android app developer to create a feature-rich application without specific limitations on its purpose. If you're a creative, inventive, and skilled freelancer, I encourage you to apply. Key Responsibilities: - Conceptualize, design, and develop a versatile Android app. - Utilize your innovation to determine the purpose of the app. - Implement comprehensive features considering our lack of specific requirements. Ideal Skills and Experience: - Proficient in Android app development. - Proven work experience in the field. - Solid understanding and experience with user authentication, push notifications, and in-app purchases. When submitting your proposal, please include: -...

    €23 (Avg Bid)
    €23 Gns Bud
    18 bud

    I need a Shopify developer to create a custom application for my store. I need this project completed as soon as possible. Ideal Skills and Experience: - Proficient in Shopify development - Experience in creating product customization features - Able to deliver projects on tight deadlines - Shopify experience

    €455 (Avg Bid)
    €455 Gns Bud
    104 bud

    I am on the hunt for a passionate Junior Developer with expertise in Qt, QML, and PySide6. My project involves developing a new desktop application from scratch. Key Responsibilities: - Collaborating with me to design and implement functional desktop applications - Translating design ideas into tangible code - Writing clean, efficient, and testable code Ideal Candidate: - Proven experience in Qt, QML, and PySide6. While junior level expertise is accepted, a strong foundation in these areas is a must. - Conceptual understanding of Desktop Application Design - Knowledge of code versioning tools, preferably Git. This project will test your creativity and technical skills, and also promises a huge learning curve for budding developers.

    €460 (Avg Bid)
    €460 Gns Bud
    58 bud

    Urgente presupuesto 60 dólares realizado estos cambios o mejoras o corregir errores Todos los requisitos de una App o Uso de una API. o Hacer un gráfico. o Modo día/noche. o Seguridad mediante Shared Preferences. o Validación de formularios. o Búsqueda de datos mediante filtros. o Evitar datos duplicados. o Uso de semáforos. o Uso de notificaciones.  Crear un chat (público y privado) para los usuarios de la aplicación.

    €4 / hr (Avg Bid)
    €4 / hr Gns Bud
    11 bud

    I need some Android developers in java I need work from New freelancers I need work for long term but at low budget I need a serious and hard working persons

    €6 / hr (Avg Bid)
    €6 / hr Gns Bud
    17 bud

    I'm looking for a proficient designer for circuit schematics and PCB layouts. The task is pretty straightforward. Specifically required skills and experiences include: - Ability to design simple circuits and PCBs. - Knowledge in component selection, particularly microcontrollers. - Proficiency in working electronics design tools. Your role will be vital in our operations, and I am keen on engaging someone who can deliver exceptional work repeatedly. A deep understanding of microcontrollers will significantly increase your chances of landing this gig.

    €17 / hr (Avg Bid)
    €17 / hr Gns Bud
    33 bud

    I am seeking a talented mobile app developer to develop an application for both iOS and Android systems. Primarily targeting young adults, this unique platform will enable proficient and engaging interactions between knowledge seekers and experts. Key features of the application should include user profiles, direct messaging, ratings/reviews, and an appointment scheduler. REQUIRED SKILLS & EXPERIENCE: - Proficient in building cross-platform applications - UI/UX designing capabilities - Experience in implementing user-profiles, messaging systems, ratings/reviews systems, and appointment schedulers. - Familiarity with young adult user preferences and trends - Understanding of how to promote user engagement and interaction - Track record of creating high-performance...

    €11 / hr (Avg Bid)
    €11 / hr Gns Bud
    69 bud

    I'm looking for a mobile application developer to create a task management app on Android Studio. This app will help users keep track of their tasks efficiently. Key Features: - User Registration: Users should be able to sign up and create an account within the app. - Task List: Users can create a list of tasks to manage. - Task Reminders: Users can set reminders for their tasks to help with their time management. - Task Categories: Users can categorize their tasks as work, personal, or school-related, for efficient organization. - Task Completion Tracking: Users should be able to mark tasks as completed. - Task Timer: tasks can be timed User Interface (UI)*: The user interface should be clean and straightforward, featuring: - A simple home screen displaying t...

    €402 (Avg Bid)
    €402 Gns Bud
    34 bud

    I need a skilled Cordova developer to build an Android plugin for me that can run in the background and track real-time location. This project requires your expertise in: - Developing mobile plugins with Cordova, specifically for Android - Implementing real-time location tracking functionality - Ensuring the plugin is designed to track location every 10 seconds This project has a high level of urgency and needs to be completed ASAP. I believe this is a straight-forward task for someone with your skills. Looking forward to receiving your bid.

    €1195 (Avg Bid)
    €1195 Gns Bud
    10 bud

    I need another version of some symbols shown on site (see attached picture). The copies muss be different and drawn in color #2d388f. i need following symbols: Air condition MATTRESS car bike motorcycle rims fume hoo...motorcycle rims fume hood kitchen front CERAMIK GLASS COOKTOP oven graut(tiles) WC shower cabin PVC floors Wooden Floors Tiles Iron plants blinds windows fittings garden furniture terraces whirlpool sauna swimming pool doors desinfection (spraybottle) freezer (ice) stains rugs couch lether watches chandlelights diffuser shoes drain sink animal cages dishwasher The symbols should be drawn as simple as possible ( on the avior swiss site they have done it very good but i can not copy it 100% - it can be similar) - I need it until thusday

    €94 (Avg Bid)
    €94 Gns Bud
    55 bud

    Page css not working. And minor amendment on the logic

    €21 (Avg Bid)
    €21 Gns Bud
    29 bud

    ...an efficient mobile application and website, specifically designed for aquaculture management. Moreover, a what's app chart bot integration is also required. Preferably, the professionals undertaking the project should have prior experience in developing apps for aquaculture or similar industries. Apart from this, added understanding of aquatic ecosystems and relevant knowledge in biological sciences would be beneficial. Key Features: - Ability to monitor water quality - A system to track the growth of fish - Provide nutritional recommendations - A enables integration of other services and products related to aquaculture - Educational platform for in-depth information - In-built feature to provide loans App Specifications: - The app needs to be designed for iOS, Andro...

    €2279 (Avg Bid)
    €2279 Gns Bud
    24 bud

    I'm in urgent need of a highly skilled app developer who can create an e-commerce app, which should run seamlessly on both iOS and Android platforms. This project requires the integration of key e-commerce features including: - Shopping Cart: A user-friendly cart system that allows for easy addition and removal of products. - Product Reviews: Customers should be able to leave reviews and star ratings for products. - Payment System: Safety-ensured system capable of processing a variety of payment methods. The ideal candidate will possess a high degree of technical proficiency, especially in creating apps suitable for both iOS and Android platforms, and also have prior experience in integrating all the required features of an e-commerce app.

    €380 (Avg Bid)
    €380 Gns Bud
    21 bud

    As it is a small task, I need it done by tomorrow, Sunday 11:00 UK time. We need a scraping command line tool for the following purpose: Scraping of to get the statuses of the packet. tool name: trackdhl parameter: the tracking ID Expected result: the detailed tracking history as JSON object containing - event date - event text from a list like this one: Sa, 30.03.2024, 11:45 The shipment has been successfully delivered Sa, 30.03.2024, 07:55 The shipment has been loaded onto the delivery vehicle Sa, 30.03.2024, 03:13 The shipment arrived in the region of recipient and will be transported to the delivery base in the next step. Th, 28.03.2024, 16:40 The shipment has been processed in the parcel center of origin We, 27.03.2024, 11:33 The shipment has been posted by the sender at the re...

    €31 (Avg Bid)
    €31 Gns Bud
    18 bud

    I need some Android developers in java I need work from New freelancers I need work for long term but at low budget I need a serious and hard working persons

    €6 / hr (Avg Bid)
    €6 / hr Gns Bud
    12 bud

    ...need of an experienced Android app developer to create a social networking app. The app will be exclusively designed for Android phones and should be compatible with the latest devices. Key Requirements: - Development of a Social Networking App: The core function of the app should be to connect users and facilitate communication through a range of features like messaging, posting, commenting, etc. - Payment Gateway Integration: The app should have a secure and efficient payment gateway to handle any transactional requirements. This will be a crucial feature to ensure smooth operation for the users. Ideal Skills: - Strong Android App Development: The ideal candidate should have a proven track record of developing high-quality, user-friendly apps specifically for ...

    €733 (Avg Bid)
    €733 Gns Bud
    9 bud

    I require a skilled developer to work on an existing Android and iOS app. This app is aimed at providing a unique experience for users, combining music transmission with haptic sensations. Music vibration code /Musica Medica App requirements We need an app code for iOS and Android in FLUTTER and LAVAVEL for already existing app (android Google and iOS Apple-Musica Medica App) The wanted code effect is to make the smartphone emitting music and music vibrations generated from online downloaded music or mp3 /mp4music from the own library. The effect of the music vibration should be, by holding the phone in the palm, a haptic sensation, like the feeling by putting a hand on a speaker. Pls, take in consideration that it is not the normal vibration like in timer...

    €2219 (Avg Bid)
    NDA
    €2219 Gns Bud
    62 bud

    I'm seeking a highly skilled professional to develop an Android app focused on warehouse stock tracking. Here’s the overview of the core functionality the app should have: - **Stock Level Updates**: The app should encompass a real-time updated inventory that reflects the current stock levels. I'm interested in exploring the possibility of updates via manual input and barcode scanning. Ideal candidate should have: - Strong experience in Android app development - Knowledge in inventory management or similar apps - Familiarity with using barcode scanning for inventory tracking(Barcode scanning could be a future option, not interested to have it in the early version, could be integrated at later stages off the app) A successful collaboration could lead to more...

    €2239 (Avg Bid)
    €2239 Gns Bud
    93 bud

    I'm in need of an Android application that will serve as a comprehensive management tool for both company-wide tasks and HR responsibilities. Key Features: - The primary function of the app should be employee attendance tracking. This feature should allow for real-time monitoring of employee attendance and absences. Ideal Skills & Experience: - Experience in developing Android apps - Strong understanding of HR and company management systems - Previous work on attendance tracking systems would be a plus

    €568 (Avg Bid)
    €568 Gns Bud
    60 bud

    Refresh of an internal screen we use for monitoring please. Details to follow.

    €99 (Avg Bid)
    €99 Gns Bud
    1 bud

    Hi Raimundus Emilianus L., I noticed your profile and would like to offer you my project. We can discuss any details over chat.

    €17 (Avg Bid)
    €17 Gns Bud
    1 bud

    I need a single page website designed for my auto glass repair business. The main goal of this website is to generate leads and promote my services. Key Features: - Minimalistic design with clear call-to-action buttons - Service offerings such as windshield replacement, windshield repair, and side window replacement should be clearly highlighted - Contact information including a contact form for potential customers to reach out Ideal Candidate: - Experience in creating engaging single-page websites - Understanding of lead generation strategies - Prior work in the automotive repair market preferred - Strong design and copywriting skills - Proven track record of creating effective call-to-action elements. Please note that this job does not require hosting or domain registra...

    €88 (Avg Bid)
    €88 Gns Bud
    89 bud

    I am looking for somone who can create a simple Logisim single datapath for me.

    €9 (Avg Bid)
    €9 Gns Bud
    3 bud
    Landing Page Design Udløbet left

    I'm looking for a skilled web designer to create a high-converting mobile landing page for my product, with the aim of driving sales. Key Details: - The primary goal of this landing page will be to promote and sell my product effectively. The page needs to be designed with this purpose in mind, using persuasive elements that encourage visitors to make a purchase. - An understanding of e-commerce best practices and how to incorporate them into the design is crucial. - The landing page should be visually appealing, easy to navigate, and optimized for conversions. Ideal Skills: - Proven experience in designing high-converting landing pages, specifically for products. - A portfolio showcasing past work in web design, particularly projects that have demonst...

    €79 (Avg Bid)
    €79 Gns Bud
    33 bud

    I'm in search of a reliable individual who can help me establish a simple, yet impactful web presence for my trucking company. The site will be a basic domain web page, and will serve as a foundation for future expansions and improvements. Key Requirements: - Incorporation of our company logo and name - Inclusion of our contact information, specifically our email address - A detailed services section, with thorough explanations of each service offered Ideal Skills and Experience: - Proven experience in web development and design - Ability to create a clean and easy-to-navigate web page - Basic understanding of the trucking industry and its specific needs - Strong communication skills to ensure that all the details provided are correctly incorporated.

    €140 (Avg Bid)
    €140 Gns Bud
    81 bud

    I'm looking for a digital marketing specialist with a focus on Search Engine Optimization (SEO). My primary goal is to improve the search engine ranking of my product pages. Key Requirements: - SEO Expertise: Your main role will be to audit and optimize product pages for improved search engine ranking. This requires an in-depth understanding of SEO best practices, keyword research, and on-page optimization. - E-commerce Experience: Prior experience working with product pages on e-commerce websites is a plus. Familiarity with platforms like Shopify or WooCommerce would be beneficial. - Results-Driven: The ultimate aim is to see tangible improvements in search engine rankings and, as a result, increased organic traffic to the site. This role is ideal for someone who is not ju...

    €181 (Avg Bid)
    €181 Gns Bud
    49 bud

    Description: Are you skilled in PCB design and proficient with Adobe Illustrator? I'm in search of a talented freelancer who can accurately trace a PCB design from an image and generate Gerber files for manufacturing. The task involves replicating the PCB layout precisely to ensure compatibility with production requirements. Key Requirements: Proficiency in Adobe Illustrator for PCB design Experience in tracing complex designs with attention to detail Ability to generate Gerber files for manufacturing Project Details: You'll be provided with an image of the PCB layout, and your task will be to recreate it faithfully in Adobe Illustrator. The final deliverables should include high-quality vector files and Gerber files ready for PCB fabrication. Budget: A budget of 1000 Rs is al...

    €22 (Avg Bid)
    €22 Gns Bud
    7 bud

    I want to add all the information in a nice way in a one slide in PowerPoint. Also, please leave a place for my picture.

    €23 (Avg Bid)
    €23 Gns Bud
    37 bud

    I'm seeking a civil engineer to assist with my project's land disturbance permit application. The ideal candidate should be highly skilled in structural design and site development. Key Responsibilities: - Utilize your expertise in structural design to ensure that all plans adhere to the necessary standards and regulations. - Develop site development plans that are in line with the project's requirements and are optimized for the environment. - Assist in the preparation of the land disturbance permit application, ensuring all necessary details are included and the document is comprehensive and compliant. Ideal Skills and Experience: - Proven experience in civil engineering, specifically in the area of permitting. - A strong background in both structural desig...

    €507 (Avg Bid)
    €507 Gns Bud
    18 bud

    ...aggregation field. The code was written in Angular with IONIC framework. We have a very well working Android app. However, there are some native features which are not provided by IONIC framework and no readymade plugins present. Issue: When app is killed, mobile is unable to send the geo location to the backend server. Anticipated Solution: We want a native code plugin to be written with below requirements. Need to develop foreground service that can keep running and get device location with following case: 1. App is running in foreground 2. App is running in background 3. Foreground service should restart if app is killed by user or Android OS 4. Service should restart on device reboot ...

    €318 (Avg Bid)
    €318 Gns Bud
    15 bud

    Vær venlig at Tilmelde dig eller Log ind for at se detaljer.

    Fremhævet Forseglet NDA

    Desarrollo de una app Android para control de check point el cual escaneará un código qr ubicado en distintas ubicaciones geográficas, al momento de escanear el código qr tendrá q guardar una foto, glosa, hora y fecha, y ubicación del GPS en modo of-line. Una ves se tenga conexión enviar esa información a una base de datos sql server(API)

    €175 (Avg Bid)
    €175 Gns Bud
    15 bud

    I am looking for a skilled Flutter developer to build a cutting-edge mobile application for both Android and iOS. The project should be completed ASAP. Key Features: I have 2 apps (customer and company user). Ideal Skills: The successful candidate should have demonstrable experience in the development of cross-platform applications using Flutter. Proficiency in implementing user authentication, push notification, and payment integration is a must. A quick turn-around time is also desired. Both apps are 80% complete. Need someone to complete the rest of the apps and errors fixed.

    €348 (Avg Bid)
    €348 Gns Bud
    38 bud

    I need some Android developers in java I need work from New freelancers I need work for long term but at low budget I need a serious and hard working persons

    €4 / hr (Avg Bid)
    €4 / hr Gns Bud
    13 bud

    I'm looking for a Flutter developer to enhance my existing mobile application. The app has a good base, but I'm looking to introduce new features and improve the user interface and user experience. Key requirements include: - Adding new features: These might include new functionalities, integration with APIs, or other elements that would enhance the app's capabilities. - UI/UX updates: I'm looking for someone who can help make the app more visually appealing, intuitive to use, and efficient in its workflow. The ideal candidate should have: - Experience with Flutter and mobile app development. - Strong understanding of UI/UX principles and the ability to implement them effectively. - A creative and innovative approach to problem-solving in the context ...

    €1144 (Avg Bid)
    €1144 Gns Bud
    117 bud

    I'm looking for a skilled Android and web developer to help me bring my project to life. Key Responsibilities: - Developing an Android application that meets the required specifications - Building a web platform that complements the app - Ensuring that the Android app and web platform work seamlessly together I would like this project to be completed within 30-45 days. Ideal Skills: - Proficient in Android development and web development - Ability to integrate Android apps with web platforms - Strong problem-solving skills and attention to detail - Good communication skills to provide regular updates on project progress Experience: - Demonstrated experience in Android and web development - Previous work on projects involving user ...

    €995 (Avg Bid)
    €995 Gns Bud
    59 bud

    As the client for this project, I am seeking a competent app developer to create an Android app with certain key features. While there is a level of flexibility, applicants should bear in mind the following key requirements: Key Features Include: - User registration and login functionality - Push notification capabilities - In-app purchase options Given the nature of the project, the ideal freelancer would possess: Skills and Experience: - Robust experience in Android app development - Proficiency in creating user registration and login systems - Prior experience with push notifications and in-app purchases - Demonstrated ability to deliver high-quality app performance. Hosting: - The application will also need to be hosted. Although a preferred hosting platform ha...

    €222 (Avg Bid)
    €222 Gns Bud
    14 bud
    Mobile application Udløbet left

    I need a simple mobile application connecting 2 groups of people. One group is advertising their goods and the other one searches via criteria. They will then see the location and come to pick it up. No financial transactions for goods purchased, only for the registriation of the seller.

    €244 (Avg Bid)
    €244 Gns Bud
    90 bud

    I need a professional with strong experience in Meta Ads Deferred Deep Linking. The primary goal of this is to drive app installations. Key requirements include: - Knowledge of Meta Ads and Deferred Deep Linking - Ability to set up a tracking solution for monitoring app installations and user engagement Note: You do not need to code or implement anything, I am also a developer and just need your assistance in implementing the same.

    €28 / hr (Avg Bid)
    €28 / hr Gns Bud
    7 bud

    I need a solid product promotion video created for me. Looking for a small-scale video content creator for social media brand promotion. Key Points: - The video will be a product promotion - It's meant for professionals and family as the target audience - The video needs to be engaging - The overall presentation should be polished and refined Ideal Skills and Experience: - Expertise in creating polished, professional and engaging product promotion videos - Understanding of the target audience and ability to tailor content to suit them - Capability to capture high quality video footage using a smartphone - Proficiency in video editing to create a refined and engaging final product Looking forward to seeing your portfolios.

    €68 (Avg Bid)
    €68 Gns Bud
    21 bud

    I'm looking for an experienced Wikipedia editor to create a detailed and professional Wikipedia page for my business. Key Requirements: - The main aim of this project is to increase the visibility of my brand on the Wikipedia platform. - The page should include a comprehensive history of my business. It's important for the editor to have a knack for storytelling and ability to weave a cohesive narrative. - I can provide verifiable third-party sources to reference, but the editor is expected to supplement these with their own research and verification. The page should be well-cited and maintain a neutral point of view. Ideal Skills: - Proven experience in creating and editing Wikipedia pages. Please provide examples of pages you have created in the past. - S...

    €159 (Avg Bid)
    €159 Gns Bud
    46 bud

    I need a professional with strong experience in Meta Ads Deferred Deep Linking. The primary goal of this is to drive app installations. Key requirements include: - Knowledge of Meta Ads and Deferred Deep Linking - Ability to set up a tracking solution for monitoring app installations and user engagement Note: You do not need to code or implement anything, I am also a developer and just need your assistance in implementing the same.

    €33 (Avg Bid)
    €33 Gns Bud
    3 bud

    I recently updated the theme of my WordPress website. However, after the update, the images on the home page are not loading properly. I need a skilled and experienced WordPress developer to fix this issue for me. webpage: Key requirements: - Troubleshoot: Identify the root cause of the issue and resolve it. It is critical that the images load properly on the home page. - Testing: Ensure that the images are displayed correctly across different devices and screen sizes, including mobile. - Optimization: If any optimization is required to improve the website's loading speed, it should also be addressed. Ideal Skills and Experience: - Proficient in WordPress: Extensive experience in working with WordPress themes and fixing related issues. - Troubleshooting: Ability

    €25 (Avg Bid)
    €25 Gns Bud
    84 bud

    I need to develop an food label app for mobile. Please check the demo app at I want the whole functionality where admins are able to print on their label their name. super admins are able to do the CRUD for the food labels

    €814 (Avg Bid)
    €814 Gns Bud
    96 bud

    I'm in need of an experienced developer to enhance my Android selection menu. The current menu functions well but I'm looking to make it more user-friendly and visually appealing. Key Requirements: - The main goal is to ensure the selection menu fills the entire screen. This will help improve user engagement. - The button sizes within the menu need to be adjusted if necessary for better alignment. - I'm also seeking a modification in the font size. The idea is to increase it without affecting the overall size of the UI elements. This change is aimed at enhancing accessibility and legibility for the users. Additional Information: - You will be provided with the source code for the current selection menu for your reference. - The responsiveness of the UI elements for...

    €17 (Avg Bid)
    €17 Gns Bud
    10 bud

    I'm currently seeking a skilled PHP Developer to revamp the landing page for my matrimonial website. Here is a snapshot of the key tasks involved: *Implement New Features* You'll be tasked with incorporating a new user registration feature and advanced search filters. *Designing Key Visual Elements* The revised landing page should contain a redesigned header complete with our logo and menu, an engaging banner or image slider, and a dedicated testimonial section. *Appearance and Branding* The intended design aesthetic for the new landing page is modern and minimalist. I'm after a clean look that signifies simplicity while carrying an air of sophistication. For this task, an ideal freelancer would have: - Proven PHP development skills, preferably with ...

    €103 (Avg Bid)
    €103 Gns Bud
    31 bud