#dart

Mobile Development Bug Report

Flutter release build showed translation keys instead of text: assets missing from pubspec.yaml

Marcus Lindqvist · Sep 30, 2026 · 7 min read

After adding German and Spanish to our Flutter app, release builds showed raw keys like checkout.pay_button instead of text. The new translation files were declared as assets only on one laptop, never in the repository. How we found it, fixed the declarations and moved to compile-time localizations.

Mobile Development

Architecting a Flutter app that stays maintainable: feature-first layers and one-way dependencies

Marcus Lindqvist · Jul 5, 2026 · 7 min read

Our Flutter app grew from five screens to sixty, and every change touched widgets, API calls and state in the same file. The structure we moved to: feature-first folders, with UI, state, repository and service layers whose dependencies point one way, and how each layer is tested.

Mobile Development Bug Report

Flutter memory grows on every screen visit: undisposed controllers and subscriptions

John Nguyen · Mar 21, 2025 · 8 min read

Our Flutter app gained about 9 MB of Dart heap every time a user opened and closed the order details screen, until older Android phones killed it. DevTools showed dozens of retained State objects held alive by a stream subscription and an AnimationController that were never disposed.