Apps that no longer build after updates
We resolve compatibility issues across Flutter, Android Gradle, Xcode, and essential packages to restore a working build.
Bug fixes · feature improvements · SDK upgrades · store updates
Flutter app maintenance, from bug fixes to store updates
We diagnose live or stalled Flutter apps and restore a stable path to building, testing, and releasing them.
KEYPLE can maintain Flutter projects built by another developer after reviewing the source and current environment. We separate the work into clear scopes, from focused bug fixes to Flutter, Android, and iOS upgrades, Firebase and API issues, feature additions, and updates for both app stores.
- 01Existing Flutter source assessment
- 02iOS and Android issue and version support
- 03Release build and store-update support
Good fit
A strong fit for these projects
If one of these sounds familiar, we can define the specific scope together.
Live apps with recurring issues
We use reproduction steps and logs to isolate issues in UI, data, authentication, payments, notifications, and server integrations.
Existing apps that need new features
We assess the current architecture before adding screens, improving journeys, or connecting new APIs and Firebase capabilities.
Apps facing store-policy or OS changes
We review target SDKs, permissions, privacy and payment policies, and current-device behavior before preparing an update.
What we do
Service scope
Choose only what you need or bring the entire product process into one engagement.
- 01Flutter project and build-environment assessment
- 02Runtime errors, crashes, UI issues, and functional bug fixes
- 03Flutter, Dart, Android, iOS SDK, and package upgrades
- 04Firebase, Supabase, REST API, and external SDK improvements
- 05Screen and feature additions, performance, and usability improvements
- 06App Store and Google Play release builds and update support
Our standard
What finished means to us
We look beyond implemented screens to the standards required for a real launch and operation.
Fixes grounded in a verified cause
We review reproduction conditions, logs, and related code so the cause and the repair scope are clear rather than masking symptoms.
A project that can be built again
Dependencies and configuration are aligned with the current development environment, with relevant changes documented.
A result ready for continued operation
We verify critical flows and device behavior and can outline store updates and the next improvement priorities.
How it works
Our process
We review the outcome of each phase together before moving to the next.
- Step 1
Review the source, current symptoms, target devices, and store status.
- Step 2
Build the project and assess logs and architecture to define the cause and scope.
- Step 3
Apply the agreed fixes, upgrades, and improvements and test critical journeys.
- Step 4
Deliver the changes and, when needed, support release builds and store updates.
Estimate
What shapes the estimate
Every product has a different level of depth, so we review these factors before estimating by phase.
Current build status
We check whether the source runs and whether certificates, accounts, configuration, or files are missing.
Project and dependency age
Flutter and Dart versions, Android Gradle and Xcode settings, and external package compatibility affect scope.
Issue and improvement scope
We separate reproducible issues, affected screens and features, and server or third-party integrations.
Testing and release scope
Target operating systems, devices, regression testing, release builds, and review support shape the estimate.
Primary technology
- Flutter
- Dart
- Android
- iOS
- Firebase
- Supabase
- App Store
- Google Play
FAQ
Frequently asked questions
Answers to questions teams often ask when outsourcing product development for the first time.
Can you maintain a Flutter app built by another developer?
Yes. We first review the source, development environment, and access to accounts and services, then assess the build and architecture before proposing a practical scope and estimate.
Can you help if an old project no longer builds?
We begin with an assessment. Large gaps between Flutter, Dart, Android Gradle, Xcode, and package versions may require a staged upgrade, which we define after the initial review.
Can you fix just one issue?
Yes. Share the reproduction steps, relevant logs, and a test account when needed. If the issue depends on a wider feature or system, we will explain the additional scope before proceeding.
Can you handle App Store and Google Play updates?
Yes. With the required developer accounts and signing information, we can support release builds, store-content updates, submission, and review responses.
How are maintenance schedules and costs determined?
We review build status, reproducibility, project versions, affected features, testing, and release needs, then separate assessment, repair, and follow-up work in the estimate.
Project guide
Read before you outsource
Practical criteria that help define scope before comparing schedules and estimates.
Flutter app maintenance: how to define cost and scope
How to separate bug fixes, SDK and OS updates, feature improvements, and store releases when estimating maintenance for an existing Flutter app.
Read insightStart a project
Start a project Start with the current state of your Flutter app.
Share the source version, the current issue, and the result you need. We will explain what is required for assessment and recommend the most practical next step.