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I’m looking to enhance my existing Android mobile app. The core build is already live on Google Play, but it needs a focused round of improvements to move it to the next level. My goal is to refine performance, polish the user interface, and introduce a handful of quality-of-life features without disrupting the current user base. What I need from you: • Review and refactor key areas of the Kotlin/Java codebase to eliminate slowdowns and reduce battery usage. • Refresh screens with up-to-date Material Design components, ensuring full compatibility from Android 8 through Android 14. • Implement two to three small features I have queued (think in-app notifications, a lightweight onboarding flow, and a settings toggle)—I’ll supply detailed specs once we start. • Squash any reproducible crashes flagged in Firebase Crashlytics and confirm fixes with a new QA build. • Generate a clean, version-controlled pull request plus a brief changelog so I can track what changed and why. You’ll get access to the private Git repository, existing design assets, and a clear task list in Jira. If you have experience with Android Studio, Jetpack libraries, and Google Play deployment pipelines, you’ll hit the ground running quickly. I’ll be available for quick code reviews and feedback throughout the sprint, and I’m open to your suggestions on best practices or additional optimizations. Let’s make the app smoother, faster, and more delightful for our users.
Project ID: 40198877
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Active 14 days ago
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73 freelancers are bidding on average $21 USD/hour for this job

Greetings from Logictrix! My name is Jas, and I am looking forward to discuss about your app in details over the Chat or Call. We have enough app developers available in team so I can assure you to deliver this project at a fairly low cost with great quality and with a commitment for long term support. *** We have now earned 'Expertise' level in AI, ChatGpt and a couple of other AI platforms for App development and other Chatbot work! *** We have developed around 400+ Android and iOS apps using Native and Flutter SDK in the past 15 years, Many apps are Live in Google play and App store. We will share our detailed portfolio over the Chat once we connect. Looking forward to your reply... Thanks and Regards Jas
$15 USD in 40 days
9.6
9.6

With my extensive experience in PHP, Java, Mobile App Development, Android, and Agile Development, I am well-equipped to upgrade your Android app features. I am confident in my ability to review and refactor codebase, implement new features, and address any crashes efficiently. The budget can be adjusted as needed, and my priority is to deliver high-quality work within your constraints. Let's discuss the project details further and get started right away. Please go through my profile to see my 15 years of experience and commitment to client satisfaction. Looking forward to hearing from you.
$18 USD in 3 days
8.7
8.7

Hello I have thoroughly reviewed your project description and am confident in my ability to assist you in completing it successfully. I believe it would be highly beneficial to delve deeper into the specifics of the job to determine the most effective way forward. I am open to scheduling an interview at your convenience, and I genuinely appreciate the chance to collaborate with you on this project. Your response is eagerly anticipated, and I'm excited about the prospect of working together. Thank you for considering my proposal. Looking forward to your prompt reply! Best regards Rekha!!!
$20 USD in 40 days
7.8
7.8

Hello, I am excited about the opportunity to enhance your existing Android mobile app. With my expertise in Mobile App Development, Android App Development, Java, Kotlin, and Agile Development, I am confident in meeting your project requirements. I propose to review and refactor the codebase, refresh screens with Material Design components, implement new features, address crashes, and provide a detailed changelog. My experience with Android Studio and Google Play deployment pipelines will ensure a seamless process. - MY WORK STATS: ✨ https://www.freelancer.com/u/XanvraTECH I look forward to discussing this project further to ensure we achieve the desired enhancements for your app. Best regards, Warda Haider
$15 USD in 40 days
6.9
6.9

Hi! I’ve worked on Kotlin/Java Android apps where the goal was exactly this—tight performance refactors, Material UI refreshes across API 26–34, and fixing Crashlytics issues without disturbing live users. I’m comfortable diving into existing codebases, optimizing battery/memory use, and adding small features like onboarding, notifications, and settings toggles in a clean, version-controlled way. With Jira tasks and repo access, I can move quickly and keep changes well documented for easy review. Looking forward for your positive response in the chatbox. Best Regards, Arbaz H
$20 USD in 40 days
6.4
6.4

✋ Hi there. I can upgrade your existing Android app with focused performance fixes, UI polish, and small feature additions while keeping the current users unaffected. ✔️ I have solid experience working on live Android apps using Kotlin and Java, refactoring code, improving battery usage, and updating UI with modern Material components. In a previous project, I optimized an app already on Google Play, fixed Crashlytics issues, added onboarding and notification features, and shipped a clean update without regressions. ✔️ For your project, I will review the codebase, target slow paths, and refresh screens to stay compatible from Android 8 through Android 14. I will implement the queued features based on your specs, follow Jetpack best practices, and keep changes organized in clear commits. ✔️ I will resolve reported crashes, validate fixes with a QA build, and deliver a pull request with a short changelog explaining each change. Feedback cycles will be quick and clear. Let’s chat to review the repo and start the sprint. Best regards, Mykhaylo
$20 USD in 40 days
5.4
5.4

I’ve worked with healthcare and fintech apps where performance and UI polish directly impacted user retention. In similar projects, refactoring Kotlin code to reduce battery drain and improve load times brought measurable gains. I’ll start by profiling slowdowns and optimizing key code paths without disrupting the current user experience. Upgrading UI with Material Design components from Android 8 through 14 is straightforward, and I can ensure consistent behavior across versions. For the small features like in-app notifications and onboarding, I’ll break the implementation into clear steps and confirm details as you share specs. I’m familiar with Firebase Crashlytics workflows and can prioritize crash fixes efficiently. After completing changes, I’ll provide a clean, version-controlled PR plus a concise changelog, making it easy for you to review and track improvements. Quick question: Are there any existing CI/CD pipelines for builds and Play Store deployments, or should I factor setup into the sprint? Ready to dive in and elevate your app’s performance and user experience.
$25 USD in 7 days
5.3
5.3

Hello , I came across your project Android App Feature Upgrade and I am very interested in working with you. I have reviewed your requirements and fully understand the scope and expectations. I specialize in PHP, Java, Mobile App Development, Android, Agile Development, Kotlin, Android App Development, Android Studio and have successfully delivered similar projects before. I am committed to delivering high-quality work with reliability, clarity, and professionalism. I work transparently throughout the project so progress, deadlines, and expectations stay clear at every stage. I would be glad to discuss further details and am ready to start immediately. Looking forward to hearing from you. Regards, Anum
$20 USD in 40 days
5.0
5.0

With a solid 20 years of experience, XtrazCon Technology Pvt. Ltd. has resolved numerous complex issues andtransformed clients' ideas into digital excellence across startups and enterprises globally. Our raison d'etre aligns perfectly with your project goals - refining performance, UI updates, integrating key features,and prompt bug fixes to enhance UX. Proficient in Java and Android with an extensive knowledge of the Kotlin/Java codebase, we are highly effective at streamlining processes, eliminating slowdowns, and reducing battery usage. In addition to our coding prowess, our familiarity with Android Studio, Jetpack libraries, and Google Play deployment pipelines makes us anideal fit for this task. Moreover, our approach is centered around open communication and collaboration; we welcome constructive feedback during iterations and encourage brainstorming sessions.I personally pledge to be available throughout the sprint for quick code reviews and timely incorporation of your suggestions. Partnering with us not only ensures a seamless execution that honours your timeframes but it also grantsyou a strong element of control as we believe in being transparent. We will provide you with clean, version-controlled pull requests complemented by a detailed changelog so you can track the progression minutely. Let's not just enhance your app but make it smoother, faster, and more delightful for your valuable users together!
$20 USD in 40 days
5.1
5.1

Hi, I’m excited about the opportunity to enhance your Android mobile app! With over 10 years of experience in Mobile App Development, I’m confident I can help you refine performance and introduce impactful quality-of-life features without disrupting your current user base. My strong proficiency in Kotlin and Java, along with hands-on experience in reviewing and refactoring code, means I can eliminate slowdowns and reduce battery usage effectively. I also specialize in applying up-to-date Material Design concepts to ensure compatibility across Android versions from 8 to 14. I’ll get started right away on the small features you’ve queued and squash any crashes flagged in Firebase Crashlytics to ensure a stable new QA build. Let’s discuss your available timelines and any specific requirements!
$25 USD in 1 day
4.8
4.8

Leveraging our decade-long experience and the excellence of a 10-member team, my company Web Crest will be your partner of choice for your Android app upgrade. What truly sets us apart is our ability to offer comprehensive solutions by harnessing AI, automation, and top-notch UI/UX design. This blend of skills is crucial to meet your goals of enhanced performance, a polished user interface, and the addition of quality-of-life features to your mobile app. Our expertise stretches to encompass Kotlin/Java codebase review and refactoring to optimize power consumption and eliminate slowdowns. In line with your requirements, we can refresh your screens with updated Material Design components ensuring compatibility across multiple Android versions. On top of that, we're proficient in Firebase Crashlytics, making us well-equipped to identify reproducible crashes and deliver concrete fixes. Moreover, we excel in deploying clean code through version-controlled pull requests that come complete with detailed changelogs. A testament to our excellence is our 98% project completion rate with stellar ratings from clients. Let's connect our Git repository to work seamlessly using Jira tasks as a roadmap for progress.
$30 USD in 2 days
4.7
4.7

Hi There, I’d love to help you enhance your Android app! It seems you're looking to improve performance, update the user interface with Material Design, and add a few useful features, all while ensuring the current user experience remains smooth. My approach would involve diving into the Kotlin/Java codebase to optimize it for speed and battery efficiency, refreshing the UI components for compatibility across various Android versions, and carefully implementing the new features you mentioned. I’m very familiar with Android Studio and the Jetpack libraries, which will allow me to effectively tackle the tasks you've outlined. Additionally, I can address any crashes reported in Firebase Crashlytics and provide you with a clean pull request and changelog for your review. As we get started, could you share more about the specific features you have in mind? Best regards,
$16 USD in 3 days
4.4
4.4

Hello, I’ve read your brief and can refine performance, modernize the UI, and add lightweight features without disrupting current users. Approach: run profiling and static analysis to locate CPU/battery hotspots, refactor Kotlin/Java hotspots and adopt Jetpack patterns; update screens to Material components with compatibility from Android 8 (API 26) through Android 14 (API 34); implement 2–3 small features from your specs (in-app notifications, lightweight onboarding, settings toggle); fix reproducible Crashlytics issues and deliver a QA build. I will produce a version-controlled PR with a clear changelog and staged commits for your quick review. How I’ll start and what I need: grant repo access, Jira task list, design assets, and the detailed specs for the queued features; I’ll run an initial smoke profile and push a diagnostic branch within 24–48 hours. I recommend a focused 7-day sprint to deliver the above and iterate on feedback. Which queued feature should I prioritize first, and can you provide the detailed spec and any acceptance criteria for that feature? Best regards,
$30 USD in 30 days
4.7
4.7

I’m an Android developer with 6.5+ years of experience working on live apps and iterative improvements using Kotlin/Java, Android Studio, and Jetpack libraries. I’m comfortable jumping into existing codebases and delivering focused upgrades without disrupting current users. I’ll review and refactor key parts of your app to improve performance, reduce battery usage, and clean up inefficient logic. UI updates will be done using modern Material Design components, ensuring smooth compatibility from Android 8 through Android 14. I’ll also implement the 2–3 queued quality-of-life features you mentioned (such as in-app notifications, onboarding, or settings toggles) strictly based on your provided specs. Any reproducible crashes reported in Firebase Crashlytics will be traced, fixed, and verified with a fresh QA build. All work will be delivered as a clean, version-controlled pull request, along with a clear changelog explaining what was changed and why. I’m used to working with Git, Jira-based task lists, and review-driven workflows, and I welcome quick feedback loops during the sprint. I also proactively suggest best-practice improvements where they add value, while keeping scope controlled and release-safe. If you’re looking to make the app faster, more stable, and more polished, I can hit the ground running immediately.
$15 USD in 35 days
4.5
4.5

Hi there, With 4 years of experience in Android development (Kotlin/Java), performance optimization, and Play Store–ready apps, I can refine your existing app to be faster, smoother, and more polished. I’ll optimize performance and battery usage, refresh UI with modern Material components, implement your queued features, and fix Crashlytics issues with a clean PR and changelog. Ready to jump into your repo and Jira tasks and work closely throughout the sprint.
$15 USD in 40 days
4.5
4.5

Hi, I’ve reviewed your Android upgrade goals and I’m ready to help sharpen performance, update UI with modern Material components, and land those small features without destabilizing current users. I’ve built and shipped multiple Android apps, with focus on battery life and smooth UIs. I’ll approach this by targeting hot paths in Kotlin/Java, profile and refactor, and ensure compatibility from Android 8 to 14. How I’d implement it: - Audit and refactor key screens and background work to reduce slowdowns and battery drain - Refresh screens with updated Material Design components across API levels - Add 2-3 small features (in-app notifications, onboarding, settings toggle) using your specs - Reproduce and fix Firebase Crashlytics crashes; deliver a QA build - Produce a clean PR with a concise changelog Availability: I can start now; expect a first QA build within 3–4 days, depending on access to Jira/tasks. Would you like the new features rolled out in a staged manner or all at once in the first QA build? Thanks,
$20 USD in 1 day
4.1
4.1

Hi, I can help take your existing Android app to the next level with focused, safe improvements that won’t disrupt your current users. I’ll review and refactor the Kotlin/Java codebase to improve performance and battery efficiency, modernize the UI with the latest Material Design components (Android 8–14), and implement your queued quality-of-life features. I’ll also fix Firebase Crashlytics issues, validate everything with a QA build, and deliver changes via a clean pull request with a clear changelog. I’m comfortable with Android Studio, Jetpack libraries, and Play Store pipelines, and I can move quickly with your Jira tasks and feedback. Let’s make the app faster, cleaner, and more polished. Thanks, Sakshi
$20 USD in 40 days
6.5
6.5

Hello, thanks for posting this project. I've reviewed your requirements and they're a strong match for my skill set. I'm highly experienced with Kotlin/Java Android app development, performance tuning, and implementing the latest Material Design updates—always making sure to preserve app stability for existing users. I can efficiently refactor your codebase, tackle performance bottlenecks, and introduce your desired features using up-to-date Jetpack libraries. Crash resolution and end-to-end QA are part of my standard workflow, as is clean version control and transparent documentation for every pull request. My focus is on delivering visible, robust app improvements while maintaining your current deployment workflow. I'm comfortable collaborating in Jira and can integrate seamlessly with your feedback and review process. Looking forward to helping take your app to the next level. Warm regards, Vitalii
$20 USD in 1 day
3.5
3.5

Hi, I can help you take your existing Android app to the next level with a focused, low-risk improvement cycle. I’ll review and refactor the current Kotlin/Java codebase to improve performance and battery efficiency, modernize the UI using updated Material Design components, and ensure smooth compatibility from Android 8 through Android 14. I’ll also implement the queued quality-of-life features you mentioned, such as in-app notifications, onboarding, and settings toggles, fix any reproducible crashes reported in Firebase Crashlytics, and validate everything with a solid QA build. All changes will be delivered via clean, well-documented pull requests, along with a concise changelog explaining what was updated and why. I’m comfortable working with Android Studio, Jetpack libraries, Git-based workflows, and Google Play release pipelines. I’ll collaborate closely with you through Jira and quick code reviews, and I’m happy to suggest additional optimizations where they make sense. If you’re looking for a smooth, polished upgrade without disrupting existing users, I’d be glad to help.
$20 USD in 40 days
3.6
3.6

I'm an Android specialist with 5+ years of experience taking live apps to the next level — exactly the kind of refinement project you're describing. I've done multiple "polish & performance" sprints on production Kotlin apps: Refactored slow screens (RecyclerView, Room queries, heavy coroutines → 40-60% faster load & lower battery drain) Migrated legacy XML layouts to modern Compose / Material 3 components (Android 8–14 full support) Added lightweight onboarding, in-app notifications (Firebase Messaging), settings toggles, and fixed dozens of Crashlytics crashes Delivered clean PRs with meaningful commit messages, detailed changelogs, and tested release builds My usual flow for such projects: Quick repo audit + Crashlytics deep-dive (1–2 days) Performance profiling & targeted refactors (Jetpack Profiler, baseline profiles, Paging 3, etc.) UI refresh with Material You / dynamic colors where it makes sense Implement your 2–3 queued features from specs Full QA pass (emulators + real devices 8.0–14), crash verification PR + changelog + updated APK for your review I work cleanly in Android Studio with Jetpack (Compose/View, Hilt, Navigation, DataStore, etc.) and I'm very comfortable with private repos + Jira. Happy to review the repo, discuss your queued features, and suggest a few quick wins once I see the code. Let's hop on chat or a quick call to align on priorities and timeline — excited to help make your app noticeably smoother and more delightful!
$20 USD in 40 days
3.2
3.2

Surakarta, Indonesia
Member since Feb 2, 2026
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