
Open
Posted
•
Ends in 9 hours
Paid on delivery
I need a standalone Windows desktop application that lets me create and manage invoices, store a searchable client database, and track incoming payments from issue to settlement—all in one place and without relying on a web browser. The program should install cleanly on modern Windows machines, load quickly, and keep all data safely on the local drive (a lightweight file-based database such as SQLite is fine, but I am open to your suggestion). I want an intuitive interface where I can: • add or edit client records and immediately pull them into a new invoice • generate invoices with automatic numbering and basic tax or discount fields • mark invoices as paid or partially paid and view real-time outstanding balances Please deliver: • a compiled 64-bit Windows installer (.exe or .msi) • complete, well-commented source code • brief setup/build instructions so I can recompile if needed in the future I’m comfortable with C#/.NET (WPF or WinForms) or similar desktop frameworks; feel free to recommend another Windows-friendly stack if it achieves the same smooth user experience. For acceptance, I will install the application on a fresh Windows machine and verify that invoice creation, client lookup, and payment status updates work exactly as described above without errors or external dependencies.
Project ID: 40454398
168 proposals
Open for bidding
Remote project
Active 7 hours ago
Set your budget and timeframe
Get paid for your work
Outline your proposal
It's free to sign up and bid on jobs
168 freelancers are bidding on average $175 USD for this job

⭐⭐⭐⭐⭐ Create a Windows App for Managing Invoices and Clients Easily ❇️ Hi My Friend, I hope you are doing well. I've reviewed your project requirements and noticed you're looking for a Windows desktop application for managing invoices and client data. You have no need to look any further as Zohaib is here to help you! My team has successfully completed 50+ similar projects for desktop applications. I will create an intuitive app that allows you to manage invoices, client records, and payment tracking all in one place. ➡️ Why Me? I can easily develop your standalone Windows application as I have 5 years of experience in C# and .NET development, specializing in desktop applications. My expertise includes database management, user interface design, and application deployment. Additionally, I have a strong grip on other relevant technologies such as SQLite and WPF, ensuring a smooth and efficient user experience. ➡️ Let's have a quick chat to discuss your project in detail and let me show you samples of my previous work. Looking forward to discussing this with you in chat. ➡️ Skills & Experience: ✅ C# Development ✅ .NET Framework ✅ WPF / WinForms ✅ SQLite Database ✅ User Interface Design ✅ Application Deployment ✅ Client Management ✅ Invoice Generation ✅ Payment Tracking ✅ Error Handling ✅ Source Code Documentation ✅ Setup Instructions Waiting for your response! Best Regards, Zohaib
$150 USD in 2 days
8.0
8.0

Hi there, ★★★ C# / .NET Expert ★★★ 5+ Years of Experience ★★★ I can create a standalone Windows desktop application that allows you to manage invoices, client records, and payment tracking seamlessly. This will include: - An intuitive interface for adding/editing client records and generating invoices. - Automatic invoice numbering and fields for tax/discount. - Functionality to mark invoices as paid or partially paid with real-time balance updates. I will use C# with .NET to ensure a smooth user experience, and I will provide a compiled installer along with well-commented source code and setup instructions. Ready to start once you provide any additional details or preferences. Thanks!
$250 USD in 7 days
7.1
7.1

Hello, As a seasoned software developer with extensive experience in C# programming, I am confident that I can deliver the robust Windows desktop invoicing software you require. My team and I at Our Software have successfully built numerous applications similar to what you need, leveraging our expertise in technologies like WPF, WinForms, and more. We ensure seamless data management - just as your database will be kept safe on your local drive without reliance on web browsers. Moreover, we understand the importance of a smooth user experience and an intuitive interface in applications like this. We know that time is valuable for businesses like yours, so our primary focus is to make sure your invoice creation process is quick and easy. By incorporating smart features like automatic numbering, tax or discount fields, and real-time balance updates, we'll make your invoicing a breeze. To further assure you of our commitment to quality, we will provide you with a compiled 64-bit Windows installer (.exe or .msi), complete source code accompanied by brief setup/build instructions so that you can easily recompile if necessary in the future. Thanks for considering us for this project! We can't wait to show you how your 'wow' factor application will help take your business to new heights. Thanks!
$130 USD in 2 days
6.9
6.9

Hi, I can build a standalone Windows desktop invoicing application that runs locally without any browser or external dependency. I would recommend C#/.NET with WPF or WinForms + SQLite for a fast, lightweight, and maintainable Windows app. SQLite is a good fit here because it keeps all client, invoice, and payment data safely on the local machine while still allowing quick search and reliable reporting. I can deliver: Client database with add/edit/search functionality Invoice creation with automatic numbering Tax and discount fields Client selection directly from saved records Paid, unpaid, and partially paid invoice tracking Real-time outstanding balance calculation Local SQLite database storage Clean Windows desktop UI 64-bit installer in .exe or .msi format Complete commented source code Setup/build instructions for future recompilation I’ll make sure the app installs cleanly on a fresh Windows machine and that core workflows like client lookup, invoice generation, payment updates, and balance tracking work smoothly without requiring any external services. My focus will be a simple, stable, easy-to-use desktop application that you can maintain and extend later if needed.
$110 USD in 7 days
7.0
7.0

Hi I can build a standalone Windows desktop invoicing application with client management, invoice creation, payment tracking, and local data storage. The main technical challenge is keeping the app fast and simple while making invoice numbers, balances, partial payments, taxes, discounts, and client lookup work reliably without external dependencies. I would recommend C#/.NET with WPF or WinForms and SQLite for a lightweight local database that installs cleanly on modern Windows machines. The app can include searchable client records, invoice generation, automatic numbering, editable line items, tax/discount fields, paid/partial/unpaid status, and real-time outstanding balance calculations. I can also create a compiled 64-bit Windows installer, organize the source code cleanly, and include comments so the project can be maintained or rebuilt later. The final handoff would include setup/build instructions and testing on a fresh Windows environment to confirm invoice, client, and payment workflows work correctly. Thanks, Hercules
$140 USD in 7 days
7.0
7.0

Hi Sir I have a ready made robust application built for windows local setup .I will demo it . Thanks
$140 USD in 7 days
6.8
6.8

Hello, I understand you need a standalone Windows invoicing desktop application (no browser dependency) with a local client database, invoice generation with automatic numbering, tax/discount handling, and full payment tracking including partial and completed settlements using a lightweight local storage system like SQLite. I will develop a C# .NET-based solution (WPF or WinForms depending on preference) with a structured SQLite database for clients, invoices, and payments. The system will include fast client search, invoice creation directly from client records, automated invoice numbering, and a real-time outstanding balance tracker. You will receive a compiled 64-bit installer (.exe/.msi), complete well-commented source code, and clear build/setup instructions for future recompilation. The application will be built with clean architecture separation (UI, business logic, and data layer) ensuring stability, performance, and easy maintenance. I can deliver a functional MVP within 5–7 days, followed by testing to confirm smooth installation and correct invoice/payment workflows on a fresh Windows machine. Thanks, Asif
$250 USD in 3 days
6.6
6.6

✅Full Experience in Invoice Generation and Management with C#/.NET Programming✅. ✳️I am very confident that complete your project perfectly. ✳️I can guarantee the quality of the job and deliver the result on time. I hope we will discuss in more detail via chat. Best regards!
$100 USD in 2 days
6.2
6.2

Hello Sir/ Mam I have checked Requirements As a seasoned developer with a wealth of Experience in Web Development I'm confident I can bring your virtual reality project to life. My track record as demonstrated in my 100% job completion and 5-star review rating showcases My ability to deliver exceptional results on time and with utmost quality I believe that my skill set makes me the ideal candidate for this project Please come on chat we will discuss more about this I will be waiting for your reply . Thank you !
$140 USD in 2 days
6.3
6.3

I am very interested in applying for your job since it seems to fit very will with my experience and skills. Regards SamirBanna
$200 USD in 3 days
5.6
5.6

I can help you build this standalone invoicing application. I will use C# with WPF for a responsive UI and SQLite for a reliable, file-based local database that requires no server setup or external dependencies. My approach focuses on a clean MVVM architecture to ensure the client lookup and payment tracking logic—especially partial payment math and real-time balance updates—is robust and easy to maintain. I will provide a self-contained 64-bit MSI installer and organized, well-commented source code, ensuring the app remains lightweight, fully offline, and simple for you to recompile in the future.
$100 USD in 7 days
5.6
5.6

Hello, I can develop this standalone Windows desktop invoicing application exactly as required. I have 8+ years of experience in .NET desktop application development using C# WinForms and SQL-based systems, with strong expertise in creating fast, reliable business software. I recommend using: • C# .NET WinForms • SQLite local database for secure offline storage • 64-bit Windows installer (.exe/.msi) Features will include: ✔ Client management with add/edit/search functionality ✔ Quick client selection while creating invoices ✔ Automatic invoice numbering ✔ Tax and discount fields ✔ Payment tracking with paid/partial paid status ✔ Real-time outstanding balance calculation ✔ Fast, user-friendly desktop interface ✔ Fully offline operation without browser dependency Deliverables: • Compiled 64-bit installer • Complete well-commented source code • Setup/build instructions for future recompilation The application will install cleanly on modern Windows systems and run without external dependencies. I focus on stable architecture, clean UI, and maintainable code to ensure smooth long-term usage. I would be happy to discuss any additional features if needed. Looking forward to working with you. Thanks and Regards Mahesh
$240 USD in 7 days
5.6
5.6

Two details shaped my plan: the fresh-Windows install test for acceptance, and the partial-payment tracking with real-time outstanding balances. I'd build this in C#/WPF with SQLite embedded, so there are zero external dependencies on your test machine. Here's how I'd ship it in 7 days: 1. Day 1-2: Client database (add/edit/search) plus SQLite schema with migrations baked in. 2. Day 3-4: Invoice module with auto-numbering, tax/discount lines, and PDF export. 3. Day 5: Payments ledger, partial-payment logic, outstanding balance dashboard. 4. Day 6-7: 64-bit MSI via WiX, smoke test on a clean Windows VM, source handover with build notes. I've shipped production C#/.NET systems with local-first data stores and clean installers, including a billing module that handled partial settlements against running balances. Done = on a fresh Windows 11 machine, the MSI installs, an invoice is created, a client is looked up, and a partial payment updates the outstanding balance correctly, with no runtime errors. Do you want invoice PDF export included in v1, or kept for a follow-up? P.S. I'd store amounts as integer cents in SQLite, not REAL, so partial-payment math never drifts by a rounding cent. Waqar
$162 USD in 7 days
5.5
5.5

Hi, I went through your requirement and I have more than 10 years of experience in C#, .NET, WinForms, WPF, SQL Server, SQLite, and desktop application development. I understand that you need a standalone Windows desktop application for invoice management, client records, and payment tracking with a clean and user-friendly interface. I have worked on multiple Windows-based business applications involving invoicing systems, customer management, payment tracking, reporting modules, database handling, and responsive desktop UI development. I can help build: Client management module Invoice creation with auto numbering Tax and discount handling Payment and outstanding balance tracking Search and filter functionality SQLite or SQL-based local database setup Clean WinForms or WPF desktop interface Installer setup (.exe/.msi) Complete source code and documentation I am comfortable working with WinForms, WPF, ASP.NET MVC, .NET Core, SQL Server, SQLite, and backend business logic implementation. The application will be lightweight, stable, easy to maintain, and fully offline with secure local data storage. Once I review the detailed workflow and invoice requirements, we can discuss the exact timeline, implementation approach, and pricing based on the actual effort involved. Looking forward to discussing the project further.
$200 USD in 20 days
5.3
5.3

Hello, I can build your standalone Windows invoicing application with a clean local workflow for client records, invoice creation, automatic numbering, tax/discount fields, and payment tracking with outstanding balances. C#/.NET with WPF and SQLite would be a strong fit here because it keeps the app fast, Windows-friendly, easy to install, and fully local without browser or external service dependency. I will provide the compiled 64-bit installer, complete well-commented source code, and simple setup/build notes so you can recompile it later if needed. I am ready to begin immediately and would be happy to discuss the project in further detail. Thanks, Teo
$200 USD in 2 days
4.9
4.9

✋ Hi There!!! ✋ The Goal of the project:- TO DEVELOP A STANDALONE WINDOWS DESKTOP INVOICING SOFTWARE WITH CLIENT DATABASE AND PAYMENT TRACKING I have carefully read and understood your project description including creating invoices, managing a searchable client database, tracking payments, and delivering a smooth, local Windows application. I am the best fit for this project because I build reliable, fast, and fully functional desktop software with clean code. I provide intuitive UI design, SQLite database management, and full source code delivery with installer and testing. I have 9+ years experience as a full stack developer and have completed similar desktop invoicing and business management applications in C#/.NET with WPF. Looking forward to chat with you for make a deal Best Regards Elisha Mariam!
$111 USD in 11 days
4.9
4.9

With my extensive experience in web and application development, I am proficient in C#/.NET which makes me a perfect fit for your project. I can create a standalone Windows desktop application that would meet all your requirements. My familiarity with both WPF or WinForms would allow me to create an intuitive and efficient interface that allows you to easily manage and generate invoices with automatic numbering, basic tax or discount fields. My knowledge extends beyond C#/.NET alone; I have thorough expertise in similar desktop frameworks, as well as Node.js, Express, React, NestJS which might add some versatility to the end product. I believe either technology stack would deliver the user-friendly nature you seek for. Rest assured, the application will install cleanly on modern Windows machines, load quickly and store all the data safely on the local drive. The compiled 64-bit Windows installer (.exe or .msi), complete source code along with setup/build instructions would all be part of the final delivery.
$150 USD in 3 days
4.6
4.6

Hello there, I read your Windows desktop invoicing project and I’m confident I can deliver a fast, clean, self-contained app that runs offline with zero web dependencies. I’m an independent developer skilled in C# with extensive experience building smooth desktop UX using WPF or WinForms, plus solid database integration with SQLite for a lightweight, local-only solution. In past projects I built standalone invoicing and client-management tools using SQLite, with features like auto-incrementing invoice numbers, tax and discount fields, client lookups, and real-time payment status tracking. The app was designed for quick local setup, easy data export, and straightforward maintenance, with clear, well-commented source code and a compact installer. I can handle this end-to-end, delivering a 64-bit Windows installer, complete source, and simple build instructions. I’ll ensure the UI pulls in client data for new invoices instantly, supports paid/partially paid statuses, and shows outstanding balances accurately as you work. Please feel free to contact me so we can discuss more details. I am looking forward to the chance of working together. Best regards, Billy Bryan
$250 USD in 3 days
4.5
4.5

Hello, I appreciate the opportunity to assist with your project to develop a standalone Windows desktop application for managing invoices and client records. I understand that you need a user-friendly solution that operates seamlessly without relying on web browsers, while also ensuring data security and fast performance. With over five years of experience in developing desktop applications using C# and .NET, I have successfully built similar tools that feature intuitive interfaces and robust functionality. I am well-versed in using both WPF and WinForms, and I can also suggest alternatives like Avalonia or MAUI if they suit your needs for a smooth user experience. To ensure your requirements are met effectively, here’s my proposed approach: - Develop a clean and responsive user interface for easy client and invoice management. - Implement a lightweight SQLite database for local data storage, ensuring quick access and searchability. - Create features for automatic invoice numbering, tax/discount fields, and real-time payment tracking. - Provide thorough documentation for setup and usage, along with well-commented source code for future modifications. I am eager to start this project, confident in delivering a high-quality application that meets your expectations. I look forward to discussing this further and can begin immediately. Thank you!
$140 USD in 7 days
4.4
4.4

Hi, I build standalone Windows desktop apps with local SQLite storage and no external dependencies. Your invoicing app matches my delivery profile exactly. I'll build a clean WPF application with: • Client manager: add/edit/delete clients, instant search • Invoice generator: auto-numbering, tax/discount fields, PDF-ready layout • Payment tracker: mark paid/partial, real-time outstanding balance • SQLite database: all data stored locally, zero cloud dependency • 64-bit installer (.msi) + complete commented source + build guide Standard .NET/WPF stack — no external packages to worry about. Fresh Windows install verification included. Milestones: 1. Client DB + invoice core (5 days) 2. Payments + UI polish (4 days) 3. Packaging + source + docs (2 days) You get working installer + source. Questions: Any specific invoice format/layout you prefer (e.g., company logo, specific fields)? Ready to start immediately. Best,
$30 USD in 10 days
4.2
4.2

quatre bornes, Mauritius
Payment method verified
Member since Mar 16, 2018
$10-30 USD
$10-30 USD
$10-30 USD
$10-30 USD
$10-30 USD
£250-750 GBP
₹150000-250000 INR
₹400-750 INR / hour
$250-750 USD
$30-250 USD
$30-250 USD
$50-65 USD / hour
$250-750 USD
$20000-50000 USD
$750-1500 CAD
$8-15 USD / hour
₹400-750 INR / hour
₹70000-80000 INR
$30-250 USD
₹1500-12500 INR
₹600-1500 INR
$250-750 USD
$30-250 USD
₹37500-75000 INR
₹1500-12500 INR