Mobile App Bug Fixing Services for iOS and Android
Is your app crashing, freezing, failing on a specific device or breaking during an Android or iOS release build? We diagnose and fix problems in React Native, Expo, Flutter, native Android and native iOS applications - from UI and state errors to APIs, authentication, notifications, native modules, signing and store-release blockers.
Share the affected build, reproduction steps and available logs. Our team will identify the likely fault domain, confirm the repair scope and give you a clear estimate before changes begin.
A Mobile Bug Can Block Every User - or Only the Devices You Did Not Test
Mobile failures depend on app version, device model, operating system, permissions, network conditions, native SDKs and backend state. A problem that never appears in a simulator can still affect real users in production, while a debug build can behave differently from the signed release sent to a store.
The App Crashes, Freezes or Opens to a Blank Screen
Users cannot complete the journey because of an unhandled exception, native crash, blocked main thread, memory issue, invalid state or release-only failure.
It Works on Android but Fails on iOS - or the Reverse
Platform APIs, permissions, native modules, layouts, lifecycle behavior or SDK configuration create inconsistent results.
The Development Build Works but the Release Build Fails
Minification, environment configuration, code signing, entitlements, Gradle, CocoaPods, native dependencies or production API settings break the distributable build.
Login, APIs or Data Synchronization Are Unreliable
Expired tokens, malformed responses, offline states, caching, race conditions or backend authorization rules leave users blocked or seeing stale data.
Notifications, Deep Links or Device Features Do Not Work
APNs, FCM, permissions, universal links, app links, camera, location, files, maps or biometrics behave incorrectly on devices or after release.
A Store Submission or Update Is Blocked
The binary crashes, contains a technical configuration problem, fails a required workflow or cannot be tested by the reviewer.
Mobile App Problems We Diagnose and Fix
Crashes, ANRs, Freezes and Blank Screens
Trace user-impacting stability failures from evidence to root cause.
- Android crashes, Application Not Responding events and startup failures
- iOS crash reports, exceptions and release-only terminations
- JavaScript, Dart, Kotlin, Java, Swift and native-module stack traces
- Memory pressure, lifecycle, concurrency and main-thread blocking issues
- Crashlytics, Android Vitals, App Store Connect, Sentry and device-log review
React Native and Expo Bug Fixing
Repair issues that cross JavaScript or TypeScript code and native Android or iOS layers.
- Navigation, state, rendering, forms and asynchronous logic
- Hermes and release-build exceptions
- Native module, New Architecture and package compatibility
- Expo SDK, development build, EAS Build and EAS Update issues
- Metro, Gradle, CocoaPods and environment configuration
Flutter App Bug Fixing
Diagnose Dart, widget, plugin, native and release-mode behavior across Android and iOS.
- Build, layout, paint and asynchronous errors
- State-management, navigation and lifecycle problems
- Platform channel and plugin compatibility
- Android Gradle and iOS CocoaPods or signing failures
- Release-mode performance, startup and device-specific defects
Native Android App Debugging
Fix Kotlin or Java applications and Android-specific platform behavior.
- Gradle, Android SDK, manifest and dependency conflicts
- Activities, fragments, services, background work and lifecycle
- Permissions, app links, notifications and device compatibility
- Play Console pre-launch, crash, ANR and technical-quality issues
- APK or Android App Bundle build and signing configuration
Native iOS App Debugging
Fix Swift or Objective-C applications and iOS-specific build or runtime behavior.
- Xcode, Swift Package Manager and CocoaPods errors
- Provisioning, capabilities, entitlements and signing configuration
- App lifecycle, memory, navigation and device permissions
- Universal links, APNs, background modes and native integrations
- TestFlight, crash-report and technical App Review issues
API, Authentication and Data-Flow Fixes
Repair the mobile-to-backend workflows users depend on.
- REST and GraphQL request, response and serialization errors
- OAuth, JWT, refresh-token, session and role-permission problems
- Offline behavior, retries, timeouts, caching and synchronization
- Firebase, Supabase and custom backend integration issues
- File upload, media, pagination and real-time data problems
Push Notifications, Deep Links and Device Services
Restore platform services that often fail outside local development.
- Firebase Cloud Messaging and Apple Push Notification service
- Notification permissions, tokens, payloads and routing
- Universal links, Android app links and custom URL schemes
- Camera, location, maps, files, biometrics and Bluetooth integrations
- Background tasks, app-state transitions and permission fallbacks
Build, Signing and Store-Release Troubleshooting
Turn a working codebase into a testable, distributable build.
- Android Studio, Xcode, Gradle, CocoaPods and EAS build failures
- Environment variables, build variants, flavors and release configuration
- Version code, build number, package or bundle identity issues
- Keystore, certificate and provisioning troubleshooting with secure access
- Technical App Store or Google Play rejection corrections and resubmission support
Performance and Device Compatibility
Improve user-visible behavior where profiling identifies a repairable bottleneck.
- Slow startup, frozen interactions and dropped-frame investigation
- Excessive network calls, rendering, image and list-performance issues
- Memory, CPU, battery and background-work concerns
- Screen size, orientation, safe-area and accessibility regressions
- Real-device and release/profile-mode verification where required
Choose the Right Level of Mobile App Support
Start with the package that best matches the problem you can currently see. We will confirm the final fault domain, platform matrix, access requirements and scope after reviewing the evidence.
- Root-cause diagnosis using supplied steps and evidence
- Focused code or configuration fix
- Test of the affected flow on the agreed platform/build
- Short handover summary
- Cross-layer or cross-platform debugging
- Fix implementation for the approved issue group
- Focused Android and/or iOS regression checks
- Build, internal-distribution or assisted release guidance
- Fix summary and next-step recommendations
- Mobile codebase, dependency and release-pipeline review
- Critical crash, build and workflow prioritization
- Stabilization roadmap and effort estimate
- Approved fixes with defined device and platform checks
- Release handover and optional ongoing support
Scope boundaries
| Boundary | Commercial wording |
|---|---|
| Included after approval | Diagnosis, focused code/configuration repair, agreed build and device checks, fix summary and limited release assistance within the confirmed scope. |
| Quoted separately | New features, redesign, major framework upgrades, backend rearchitecture, data migration, broad security work, automated test suites and full store-launch management. |
| Client responsibilities | Valid source-code ownership, test accounts, available logs, access to relevant developer/store services, devices or builds, and timely approval. |
| External dependencies | Apple, Google, device manufacturers, third-party SDKs, payment providers, hosting and store-review timelines remain outside iTechOza’s control. |
| Not guaranteed | Universal one-day resolution, approval by an app store, support for every device/OS, recovery of lost keys, or prevention of every future defect. |
Can This Mobile App Bug Be Fixed Within One Business Day?
Often, yes – when the issue is isolated, reproducible, supported by useful evidence and expected to require no more than four developer hours. We confirm eligibility only after reviewing the app version, platform, recent changes, logs and required access.
✅ Usually eligible for a one-day fix
- One reproducible UI, form, navigation or state-management defect
- One isolated API mapping, timeout, token-refresh or data-display issue
- A known dependency or build-configuration problem with clear error logs
- A notification, deep-link or permission issue already narrowed to one platform
- A single-platform crash with a useful crash report or reliable reproduction path
- A focused layout or device-compatibility regression with a defined test device
⚠️ Requires a custom estimate
- Intermittent crashes, ANRs or memory problems that cannot yet be reproduced
- Several affected app versions, devices, OS versions or native SDKs
- Missing source code, incomplete build ownership or lost signing material
- Major React Native, Expo, Flutter, Android or iOS version upgrades
- Backend, payment, subscription, data-loss, security or infrastructure involvement
- Backend, payment, subscription, data-loss, security or infrastructure involvement
- A full inherited-app stabilization, redesign, migration or release program
Most isolated mobile bugs can be resolved within one business day after technical review, access confirmation and scope approval.
A Repair Process Built Around Reproduction, Evidence and Safe Release
A fast fix still needs a controlled process. We keep the engagement focused, explain what we find and test the affected flow before handover.
01
Send the Issue Details
Share the app stack, affected build, platform, device/OS information, reproduction steps, screenshots, recording, crash ID or store-review message.
02
Reproduce and Diagnose
We reproduce the behavior where possible and trace it across app code, native configuration, device services, APIs, backend state and release settings.
03
Confirm Scope and Estimate
You receive the likely root cause, proposed repair boundary, platform/test matrix, access needs, estimate and assumptions before billable implementation begins.
04
Implement and Test
We make the approved changes, build the relevant target and test the affected flow plus focused neighboring regressions.
05
Handover and Release Support
You receive the code change, a concise fix summary, test evidence and agreed guidance for internal distribution, store resubmission or deployment.
Evidence and access checklist
| Input | What helps diagnosis |
|---|---|
| Minimum evidence | App version/build, affected platform, device and OS, reproduction steps, expected versus actual result, first occurrence and recent changes. |
| Useful diagnostics | Crash report, stack trace, Android vitals or Crashlytics issue ID, App Store Connect report, device log, network trace, screen recording or store message. |
| Testing access | Test account, internal-distribution build, TestFlight or Play testing access, backend test environment and reproducible sample data where relevant. |
| Source/build access | Repository, branch, package lockfile, project configuration and CI/EAS/build logs after qualification. |
| Sensitive access | Passwords, signing keys, certificates, keystores and service credentials exchanged only through an approved secure channel with least-privilege access. |
Definition of done
| Acceptance area | Completion evidence |
|---|---|
| Root cause | The diagnosed cause and affected layer are documented in plain language. |
| Approved fix | The agreed code or configuration change is committed or delivered through the approved workflow. |
| Build result | The agreed development, preview or release target builds successfully when build work is in scope. |
| Affected flow | The original reproduction path no longer fails on the agreed platform/device matrix. |
| Focused regression | Relevant neighboring behavior is checked without implying a full-application QA pass. |
| Handover | The client receives change notes, known limitations and recommended next actions. |
One Team Across Mobile, Native, API and Backend Layers
Working inside an existing codebase requires more than writing new code. It requires careful diagnosis, respect for the current architecture and clear decisions about what should—and should not—change.
9+ Years of Web and App Development
Experienced delivery across mobile applications, business systems, APIs, cloud services and production support.
Cross-Platform and Native Troubleshooting
We examine React Native, Expo or Flutter code without ignoring the Android and iOS layers underneath it.
Backend and Integration Experience
Mobile failures often originate in authentication, APIs, databases, webhooks or third-party services, so the investigation does not stop at the screen.
Production-Safe Working Process
Access is minimized, changes are scoped, backups or rollback responsibilities are confirmed and release actions require approval.
Clear Technical Communication
You receive a practical explanation of the root cause, repair boundary, evidence, limitations and next steps.
Support After the Fix
If the application needs broader recovery or ongoing care, the repair can transition into an approved audit, stabilization or maintenance engagement.
Technology coverage
Cross-platform: React Native, Expo, JavaScript, TypeScript, Flutter and Dart
Android: Kotlin, Java, Android Studio, Gradle, Android SDK, Firebase and Google Play Console
iOS: Swift, Objective-C, Xcode, CocoaPods, Swift Package Manager, TestFlight and App Store Connect
APIs and data : REST, GraphQL, WebSockets, JSON, OAuth, JWT, Firebase, Supabase and custom backends
Device services : APNs, FCM, deep links, maps, location, camera, media, files, biometrics and background tasks
Diagnostics and release:Crashlytics, Android vitals, App Store crash reports, Sentry, EAS, CI/CD, signing and internal distribution
Related backends: Node.js/MERN, Laravel/PHP, MySQL, PostgreSQL, MongoDB and serverless functions
Who This Service Is For
Founders and Product Owners
You have an MVP or live app, but crashes, broken flows or release blockers are delaying users, revenue or investment.
Businesses With a Live Mobile App
A production issue is affecting customers and you need an accountable team to investigate and repair it.
Agencies and Development Partners
You need white-label or specialist support for a client application that has crossed into native, backend or store-release complexity.
Teams Inheriting an Existing App
The original developer is unavailable, documentation is incomplete or a dependency upgrade has destabilized the codebase.
Web Teams Shipping Their First Mobile Product
The backend works, but device behavior, signing, native SDKs and store distribution require experienced support.
Tell Us What Is Broken
Give us enough evidence to understand the affected platform, app version, user impact and likely fault domain. We will request secure technical access only after the initial review.
Frequently Asked Questions About Mobile App Bug Fixing
We troubleshoot crashes, freezes, blank screens, UI and navigation defects, state problems, login and session errors, API and data failures, notification and deep-link issues, device permissions, native integrations, build and signing errors, performance problems and technical store-release blockers. Final scope is confirmed after review.
We support React Native, Expo, Flutter, native Android and native iOS applications. We also investigate related APIs, authentication, databases and third-party services when they are part of the affected mobile workflow.
Yes. We can work on one platform or both, depending on the application architecture and issue. The estimate defines the affected platforms, app versions, devices and operating-system test boundary.
Yes. This can include JavaScript or TypeScript defects, Hermes release errors, navigation and state issues, native module compatibility, Metro, Gradle, CocoaPods, Expo SDK, EAS Build and EAS Update problems.
Yes. We can investigate Dart and widget errors, state and navigation issues, plugin or platform-channel problems, release-mode behavior, Android/iOS build failures and performance defects. The relevant physical-device and build-mode checks are agreed during scoping.
Yes. If the issue is isolated, we can begin with a repair. If the codebase is unstable, undocumented or affected by many recurring defects, we may recommend a Code Audit & App Recovery engagement before promising a larger fix scope.
Many isolated, reproducible issues can be resolved within one business day after technical review, access confirmation and scope approval. Intermittent crashes, native dependency conflicts, signing gaps, multi-device regressions, backend involvement and major upgrades usually require a custom estimate.
Please provide the app stack, affected platform and build, device and OS, reproduction steps, expected and actual result, recent changes, screenshots or recording, and any available crash or build logs. Do not send credentials or signing material through the public form.
Not for the initial request. After qualification, we usually need least-privilege repository and build access. TestFlight, Play Console, Firebase, Expo or store access is requested only when required, and sensitive credentials should be exchanged securely.
Yes. We can trace REST or GraphQL requests, OAuth or JWT sessions, refresh tokens, permissions, caching, retries, offline behavior and synchronization. If the main problem is a broad third-party integration rather than the mobile client, we may scope it through our API Integration Fixes service.
Yes. We can investigate APNs, Firebase Cloud Messaging, tokens, permissions, payload routing, universal links, Android app links and custom URL schemes. Testing may require controlled access to provider configuration and physical devices.
Yes, when valid project ownership and required signing access are available. We troubleshoot Gradle, Android SDK, Xcode, CocoaPods, package dependencies, entitlements, provisioning and release configuration. Lost or inaccessible signing assets may require recovery steps controlled by Apple, Google or the account owner.
We can fix technical causes such as crashes, broken reviewer flows, build configuration or code-level issues. We do not guarantee approval and cannot resolve account, legal, intellectual-property, content-policy, business-verification or store-timing matters through code alone.
We retest the original reproduction path on the agreed platform, build and device matrix, then perform focused checks around affected behavior. A full application QA cycle, broad device lab or automated test suite is separately scoped.
Pricing depends on reproducibility, affected platforms, number of bugs, build and device requirements, native or backend involvement and release risk. We review the evidence first and provide a fixed estimate or clearly defined time-based scope before implementation.
Yes, subject to the agreed contract and payment terms. Changes should be delivered through the client's repository or an approved handover process, with third-party open-source licenses and provider terms remaining applicable.
Yes, an NDA can be arranged. After the fix, we can discuss a broader recovery plan or an ongoing mobile maintenance arrangement for updates, monitoring, dependency care and reserved support capacity.
Stop Losing Users to a Mobile App Problem You Cannot Reproduce or Release
Send the affected build details, platform, reproduction steps and available evidence. We will review the issue, explain what we need next and provide a clear repair estimate before implementation begins.
Get My Mobile App Fixed