Mobile App Development Projects

opportunity

Full Stack Mobile Developer - (Flutter/Node.js)

We are launching an innovative, ultra-lightweight mobile application specifically engineered for the Zimbabwean consumer market called "Uvyro Data Pass". The platform focuses on distributing cost-effective daily data micro-bundles to local users by connecting mobile network APIs with automated ad-network micro-subsidies. We are seeking an experienced Full-Stack Mobile Developer who intimately understands emerging market constraints—specifically optimizing for low bandwidth, cellular network drops, and aggressive asset compression. Your objective will be to build our Minimum Viable Product (MVP) from scratch, linking local payment rails to programmatic telecom data distribution. KEY TECHNICAL REQUIREMENTS: • Frontend Mobile: Flutter & Dart. The production Android application package (.apk) MUST be strictly optimized to compile under 15MB to protect our users' data budgets. • Server Backend: Node.js (Express) or Python (FastAPI). Lightweight, fast, and structured behind a secure server environment variable layer (.env). • Cloud Infrastructure: Experience deploying and managing clean virtual private servers (specifically a Linux droplet on DigitalOcean scaled for low monthly overheads). • Database: PostgreSQL with robust schema configurations designed for an offline-first state machine architecture. REQUIRED API INTEGRATIONS: 1. Paynow Zimbabwe API: To handle automated EcoCash, InnBucks, and OneMoney USSD push prompts and backend verification webhooks. 2. Africa's Talking API: To manage automated real-time mobile data bundle fulfillment to recipient SIM cards. 3. Google AdMob SDK: Implementing secure Server-Side Verification (SSV) rewarded video ad sequences that serve as a security lock/unlock gate for transactions.

pre-funded

Mobile App Developer (FlutterFlow + Supabase) - South Wales

I am looking for an experienced mobile app developer to build a field lookup and grading tool from scratch for my catalytic converter recycling business, Crucible Exchange Ltd. The app will be used on-site in the yard to quickly look up codes from a catalogue of ~14,500 items, factor in live PGM market movements, apply a custom margin fee structure, and calculate net buy prices on the spot. Key Scope & Requirements: Database & Scale (Supabase): Set up a PostgreSQL database handling ~14,500 catalog rows with image storage, optimized full-text search indexing across both primary and extra codes plus manufacturers, and proper Row Level Security (RLS). Mobile Layout Architecture (FlutterFlow): Build a mobile-first ListView using custom Cards (Thumbnail Image, Primary Code, Extra Code, Manufacturer, Description) designed for fast, one-handed scanning on smartphones. Search & Pagination: Implement server-side filtering and infinite-scroll pagination so 14.5k rows load instantaneously without lagging. Pricing & Margin Engine: Integrate calculation logic that applies a percentage fee/margin structure against base PGM values or fixed pricing data. Condition Grading Modifiers: Include quick-select buttons on the pricing view (Full Core - 100%, Partial/Damaged - %, Empty - 0%) that dynamically adjust the calculated buy price on the fly. Batch Tally / Basket Feature: Allow users to tap "Add to Batch" on multiple converters to build a running total payout list for multi-unit purchases with an itemized summary output. In-Person Kickoff: Must be based in or near South Wales (Cardiff, Newport, Swansea, Hengoed, or surrounding M4 area) for an initial in-person meeting to go over the physical dataset and valuation workflow. etc... Deliverables: Fully working mobile app built directly inside my existing FlutterFlow and Supabase accounts with 100% IP/source handover. Budget: Fixed Price: £1,000 (Split across 3 Escrow Milestones)

IOS App HTTP Request Analysis

I need an experienced developer to analyze HTTP/HTTPS requests of the official IRCTC Rail Connect iOS app, from login to the complete booking process. App Link: https://apps.apple.com/in/app/irctc-rail-connect/id1386197253 Please note that this is not a one-time project. I will need this work every week, so I’m looking for a long-term working relationship. Kindly offer me a reasonable budget so I can hire you every week without hesitation. If the work and pricing are good, we can continue regularly.

opportunity

React Native / Expo developer to support app ownership migration

React Native / Expo developer to support app ownership migration (iOS + Android, Supabase, RevenueCat) About the project We are acquiring a live AI calorie-tracking app on the App Store and Google Play. The seller is transferring the app, code and accounts to us over the next few weeks. We need an experienced developer on our side to set up our accounts, receive and check every transfer, and make sure we can build, run and release the app independently. Tech stack - Expo SDK 54, React Native, TypeScript, expo-router - EAS Build and EAS-managed signing (no CI/CD yet) - Supabase: Postgres, Auth (email, Apple, Google), Storage, 16 Edge Functions, scheduled jobs - OpenAI GPT-4o, called through Supabase Edge Functions - RevenueCat subscriptions (iOS and Android) - Firebase (FCM push, Google Sign-In), Sentry, PostHog, Vercel website Scope of work 1. Help set up our accounts so they are ready to receive transfers: Apple Developer, Google Play Console, GitHub, Expo, Supabase, RevenueCat, Firebase, OpenAI, Sentry and PostHog. 2. Check each transfer against our handover checklist as it arrives, and tell us about anything missing or incomplete. 3. Build and run both apps from a clean checkout of the transferred repository using EAS. 4. Check the Supabase project: migrations, row-level security, edge functions, scheduled jobs and secrets. Switch to our own OpenAI key and turn on backups. 5. Rotate all credentials and API keys after handover. Create a new APNs key, and confirm Sign in with Apple, Google Sign-In and push notifications still work. 6. Confirm RevenueCat is set up correctly (store notifications, webhook to Supabase), and run sandbox test purchases on iOS and Android. 7. Release a new build to both stores from our own accounts. 8. Confirm the seller's access has been removed from all accounts. 9. Write a short handover report: how to build and release the app, where everything lives, and any risks or issues you found. You will work alongside the seller's developer, who provides support until 31 December 2026. You may also be asked to review two new features the seller is building and confirm they work as described. What we're looking for - Proven experience shipping Expo / React Native apps to both stores with EAS - Hands-on Supabase and RevenueCat experience - Experience with App Store Connect and Google Play app transfers is a strong plus - Clear written English and regular progress updates - Available from mid October to December 2026 - Willing to sign an NDA Ongoing work If this goes well, there is potential for recurring monthly work from January 2027 to manage and maintain the app. This would include monitoring crashes and performance, dependency and Expo SDK updates, store releases, Supabase maintenance, small fixes and improvements, and new features quoted separately. To apply, please include: 1. Two or three Expo / React Native apps you have shipped, with store links 2. Your experience with Supabase and RevenueCat 3. Whether you have handled an App Store or Google Play app transfer before 4. Your availability over the next 6 to 8 weeks

opportunity

Electrical company work app

I require a professional mobile and web app for an electrical company to streamline job sheets and timesheets. Technicians will log job details, hours, materials used, photos and signatures; entries sync in real time to an admin dashboard for oversight, approvals and invoicing. The system should support user roles, job assignment, offline data capture, PDF export, searchable records and secure storage. Proposals should include UI/UX, tech stack, timeline and testing plan.

Convert Web App to Android & iOS Apps + Publish on Both Stores

Hi Freelancers, We run a live astrology consultation platform where users chat with verified astrologers. Our web app is already live .We need an experienced Android developer to turn it into an Android app with AI-powered features, and get it approved and published on the Google Play Store. SCOPE OF WORK - APP - Build an Android app from our existing web app (WebView/Capacitor/Flutter, suggest what works best) - Add push notifications for new chat messages and consultation alerts - Splash screen, app icon, offline/no-internet screen, back-button handling, deep links - Make sure login, live chat, wallet recharge and payment flows work smoothly inside the app SCOPE OF WORK - AI FEATURES - AI Astrologer chat: instant AI answers to astrology questions, available 24/7, especially when no human astrologer is online - AI Kundli / birth chart: generate a birth chart from date, time and place of birth, with an easy-to-read AI explanation - Personalised daily, weekly and monthly horoscope based on the user's birth details - AI compatibility (kundli matching) report for couples - Smart astrologer recommendation: suggest the best-suited astrologer based on the user's question - Integrate using an AI API (OpenAI, Claude or Gemini). API keys must be kept on the server, never inside the app - Usage limits and cost control (e.g. free AI messages per day, then paid via wallet) - Support for English and Hindi responses COMPLIANCE AND PUBLISHING - Make the app compliant with Google Play policies (payments, data safety, permissions, target API level, and the AI-generated content policy including an in-app option to report offensive AI responses) - Prepare the store listing: screenshots, feature graphic, short and full description, privacy policy link, Data Safety form, content rating - Upload and submit the app using our Play Console account, and fix any rejection until it is approved and live - Hand over full source code, signed AAB file, keystore and a short guide for future updates REQUIREMENTS - Proven experience publishing apps on Google Play (please share live Play Store links) - Hands-on experience integrating AI/LLM APIs into mobile apps - Experience with chat, consultation or wallet-based apps is a plus - Familiar with Google Play's closed testing requirement for new developer accounts - Good communication and regular progress updates DELIVERABLES - App with AI features live and approved on Google Play Store - Source code, AAB, keystore and credentials handed over - 30 days of free bug-fix support after launch TO APPLY, PLEASE INCLUDE 1. Links to 2-3 apps you have published on Google Play 2. Any app you have built with AI/chatbot features 3. Your recommended approach for our app, including the AI part 4. Fixed price and estimated timeline (please price the app and AI features separately) Please start your proposal with the word "Kundli" so we know you have read the full post. Thanks, Ashish

opportunity

Mobile deployment and iOS and Android account

I need someone who can complete the deployment of our app from existing platforms to make it live via our existing design site . You will need to creste UI/UX for our app and lunch it via iOS and Android . You will creste IOS and Android account on our behalf and lunch our app live Secondly , you will update app with our existing strip payment gateway on split payment and link this with our wallet and use wallet in the admin section Do not apply for this if you know you cannot do this deployment and have expertise to complete our from existing platform we already used to design the app.

React Native Developer - Supabase & Payment Integrations

SplitSense is a free, ad-free alternative to Splitwise that helps people manage group expenses, scan receipts, split individual items, merge balances, and simplify settlements. getsplitsense.com We are looking for an experienced React Native developer who can work across the mobile application and its Supabase backend. Payment integrations and settlement flows are an important part of the role, but you should also be comfortable improving existing features, fixing bugs, and contributing thoughtful product ideas. What you will work on - React Native and TypeScript development across the SplitSense mobile app - Supabase Auth, Postgres, Row Level Security, database functions, storage, and backend integrations - Payment and settlement experiences, including UPI, payment providers, webhooks, transaction states, and reconciliation - Debugging and improving existing product flows - Secure handling of user, expense, and payment-related data - Android and iOS testing, performance, and production releases - Reviewing requirements and suggesting simpler or better solutions when appropriate What we are looking for - Strong production experience with React Native and TypeScript - Hands-on experience with Supabase in a real application - Experience implementing payment integrations or other transaction-sensitive workflows - A solid understanding of authentication, database security, Row Level Security, and API design - The ability to read an existing codebase and become productive quickly - Strong debugging skills and attention to product behaviour and edge cases - Clear communication and the confidence to suggest improvements instead of only following instructions Product familiarity is required We are a fast-moving team and expect candidates to arrive prepared. Before applying, install SplitSense, create your account, and spend some time using it as a real user. At minimum, create a group, add a few expenses, and explore the splitting methods, balances, settlements, group settings, and activity history. We will ask detailed questions about features across the entire application during the interview. We want candidates who take the initiative to understand the product as real users before discussing how they would improve it as developers.

Quiska – Haitian Grocery Marketplace

**Quiska – Haitian Grocery Marketplace** We are looking to build a multi-platform e-commerce marketplace focused on Haitian grocery products. Quiska will connect customers with local sellers and provide reliable delivery directly to customers. The project will include **4 main interfaces**: 1. **Customer App** – Browse products, search, add to cart, place orders, make payments, and track deliveries. 2. **Vendor App** – Manage a store, add products, update prices and inventory, receive and process orders, and track sales. 3. **Delivery App** – Receive delivery requests, view customer locations, manage delivery status, navigate to customers, and confirm deliveries. 4. **Admin Dashboard** – Manage customers, vendors, products, orders, payments, deliveries, commissions, and platform analytics. We are looking for a developer/team experienced in **Flutter or React Native, backend/API development, database architecture, payment integration, GPS/location services, notifications, and e-commerce marketplaces**. The goal is to build a scalable MVP that can launch in Haiti and later expand to other markets. What would you charge to build this MVP?

Google Console Keysign Mis-match

Not your usual mis-match, howerver. every time i try to upload my .abb i get get message: "Your Android App Bundle is signed with the wrong key. Ensure that your App Bundle is signed with the correct signing key and try again. Your App Bundle is expected to be signed with the certificate with fingerprint" So Google expects the B6 Key, I'm assuming the origanal one, which i don't have, find, and all this time Ive been using a B4 Key. which I think is from, stamped from Android Studio's kind of "throw away"-practice key , which is the B4. So see where Im coming from? & real key has never been used.,The last guy also said i had to replace the data inside my gradle dot someto possibly. IDK.. Pls, try to help me out, This is my "just for fun dream app, Im also a cancer patient(i'll send u proof if u want me to, I can't afford much, Pls, tell me one section at a time, I'll go and do it, then I'll return, and we do it this pattern again, I say this way if it's ok?

Enhancing Flutter/Node.js Live-Stream Social Platform

Flutter + Node.js team to extend a live-streaming social platform (long-term) We are extending an existing, live platform. This is not a build from zero. WHAT EXISTS TODAY - Backend: Node.js, Express, MongoDB, Socket.IO. 355 live endpoints, 61 data models, a socket layer of about 5,800 lines. Deployed and running in production. - Admin panel and two web cabinets: Next.js, live. - Public website: React on Vite, three languages, complete and signed off. - Mobile application: Flutter, clean architecture, in active development. - Design: complete. 761 screens in light theme, a mirrored dark theme, twelve user-flow diagrams and a clickable prototype. No UI design work is required from you - screens are delivered to you finished. WHAT WE NEED BUILT - New product modules across backend, admin panel and mobile application - A configurable rules layer for platform economics, with versioning and effective dates - Creator wallet with multiple balances and money states, and payout workflows - Group communities, a second in-app currency, new battle formats, an advertising module - Localisation for three languages, dark theme implementation, iOS camera effects, store submission STACK YOU MUST ALREADY KNOW Flutter with clean architecture, Node.js and Express, MongoDB, Socket.IO, Next.js, LiveKit or Agora, and payment integrations of the Stripe / PayPal / Razorpay class. ENGAGEMENT Long-term, hourly, in blocks. Work is done module by module in a priority order we set. A shared task and hours tracking sheet and a written weekly report are required. BUDGET GUIDELINE USD 3 to 6 per hour. YOUR PROPOSAL MUST INCLUDE 1. Your estimate of the total hours for the scope above, and how you arrived at that number. 2. Team composition and the hourly rate of each role. 3. CVs of the people who would actually do the work, not a company profile. 4. Two live applications you have shipped that handle real-time video or in-app payments, with links. 5. How you handle testing, and who pays for correcting defects in your own work. Proposals without an hours figure will not be reviewed. Source code, documentation and design access are provided after an NDA is signed.

opportunity

Voice recording app

Develop a A voice recording app Use a proven open‑source audio library with high‑quality capture, e.g.: Oboe (low‑latency audio for Android) Or native AudioRecord with PCM/WAV and proper buffer settings Record in PCM/WAV or high‑bitrate AAC to match or exceed Easy Voice Recorder Pro quality. Backend integration: Sync to backend using API: GET /meetings?date=YYYY-MM-DD Display list of today’s scheduled meetings (title, time, duration). User selects a meeting → tap “Start recording”. Begin offline recording (no streaming). Save file locally as: meetingName_YYYYMMDD_HHMM.wav (or .m4a) Upload to backend: Background worker to sync when network is available. If backend not reachable: Store recording + metadata locally. Mark as “Pending upload”.

Flutter developer

Flutter Developer Needed: Build AC Survey App from Existing Source Code Project Overview I need an experienced Flutter developer to take my complete source code for a mini-split air conditioning site survey app and build it into a working Android APK that I can install on my phone and tablets. Important: The app is already fully coded. I'm not asking you to write it from scratch. I need you to: 1. Review the code for any issues 2. Build it into a working Android app (APK) 3. Test it thoroughly 4. Deliver the installable APK file 5. Optionally help publish it to the Google Play Store What I'll Provide Complete Flutter source code (all screens, models, services, utilities) List of all packages/dependencies used Detailed feature list and workflow description Access to answer any questions about the business logic Prompt feedback during testing What You'll Do 1. Code Review & Setup Download and review all source code files Set up the Flutter development environment Run  flutter pub get  to install dependencies Run  flutter pub run build_runner build  to generate Hive adapters Fix any compilation errors or dependency conflicts 2. Build the Android App Configure Android build settings (min SDK, target SDK, app name, package name) Build a release APK (not debug) Ensure the app runs smoothly on Android 8.0+ devices Optimize APK size where reasonable 3. Testing Install the APK on at least one physical Android device Test the complete workflow: Create a new survey Fill in all fields (property details, electrical assessment, rooms, outdoor unit) Take photos with the camera Save the survey Reopen and edit the saved survey Generate and share the PDF report Verify photos appear in the PDF Test on different screen sizes if possible (phone and tablet) Fix any bugs discovered during testing 4. Deliverables Working APK file ready to install Source code with any fixes you made Brief documentation on how to install the APK List of any changes you made to the original code (Optional) Help publishing to Google Play Store Technical Stack The app uses: Flutter 3.x (latest stable) Dart 3.x Key packages:  hive  and  hive_flutter  for local storage  pdf  and  printing  for PDF generation  image_picker  for camera/photos  image  for photo compression  share_plus  for sharing  path_provider  for file paths  uuid  and  intl  for IDs and dates App Features (For Your Reference) The app is a 4-step survey tool for UK air conditioning installers: Step 1: Property Details Customer name, address, postcode Property type, construction era, wall type, glazing Photo capture (property photos) Step 2: Electrical Assessment Main fuse rating (60A/80A/100A) Consumer unit type Toggles for EV charger, electric shower, heat pump, solar, battery Live calculation of total electrical load Warning if load exceeds 80% of main fuse capacity Photo capture (consumer unit, meter) Step 3: Room Survey Add multiple rooms (repeatable) For each room: dimensions, floor level, orientation, windows, insulation Live BTU calculation per room Recommended unit size (2.5kW, 3.5kW, 5kW, 7kW) Photo capture per room Step 4: Outdoor Unit & Compliance Outdoor location, wall material, line-set length Condensate route, noise notes Compliance checkboxes (F-Gas, Part P, Part F) Photo capture (outdoor location) Summary Screen Review all survey data Generate professional PDF report with all data and photos embedded Share via email, WhatsApp, etc. Survey List Home screen shows all saved surveys Edit or delete existing surveys Persistent local storage using Hive