
Fix Crash / Bug
Diagnose and fix one mobile app crash or bug with regression testing.
Your product should not stop at the browser.
Describe the app, the audience, the flows and the platforms you need. A mobile engineer builds it, tests it on real devices and takes it through store submission.


Diagnose and fix one mobile app crash or bug with regression testing.

Improve Play Store keywords, screenshots and listing copy for downloads.

Improve App Store metadata, screenshots and previews for search and installs.

Prepare signing, builds and Play Store listing, then submit your Android app.

Set up certificates, profiles and App Store Connect, then submit your iOS app.

Add FCM or APNs alerts with topics, deep links and user preferences.

Improve app memory, rendering, network use, install size and startup speed.

Add secure email and social sign-in with session and token management.

Add secure in-app payments, subscriptions, receipts and transaction history.

Add maps, place search, routes, live location tracking and geofencing.

Enable real-time private and group chat with media, receipts and alerts.

Keep your app usable offline with local storage, sync and conflict handling.

Adapt your app for tablets with responsive layouts, split views and tasking.

Modernize your app's visuals, navigation and components without losing features.

Move a native app to Flutter or React Native for one iOS and Android codebase.

Split a shared app into native Swift and Kotlin builds for each platform.

Update app SDKs, replace deprecated APIs and test current OS compatibility.

Move your app backend, data and APIs with a planned low-downtime cutover.

Launch an iOS or Android MVP with core features, auth, APIs and store release.

Launch one Flutter or React Native MVP to both stores with auth and payments.

Build a buyer-seller app with listings, chat, payments, reviews and admin.

Build customer and provider apps for booking, tracking, payments and alerts.

Create profiles, feeds, posts, messaging and moderation for a social app.

Sync smartwatch health data, notifications and quick actions with your app.

Build a high-performance Swift app with native Apple APIs and iPad support.

Build a Kotlin app with Material Design and native Android features.
Compare related packages by the work they actually include.
The native iOS and Android packages build for one operating system. The both-stores MVP offers a shared Flutter or React Native codebase for launch on both. Platform-specific requirements should be checked against each package scope.
Listing optimization improves the text and assets in an existing store listing. Deployment covers the submission workflow for a build that is ready to publish. Review the platform-specific requirements in the selected offer.