Battle-tested patterns from 12+ Flutter apps in production, including the boring infra that actually moves the needle.
Crash-free percentage is the single most-important quality signal for any consumer app. It's also the easiest thing to ignore until it's too late. Here's how we keep it above 99.7% on every Flutter app we ship.
First: Sentry from day one. Second: a typed routing layer (go_router) so deep links never crash the app. Third: an offline-first architecture, because the #1 cause of crashes is unhandled network failures.
Fourth: golden tests for every key screen. They take 20 minutes to write and they catch the layout regressions that no human reviewer notices. Fifth: a CI matrix that runs on real iOS + Android devices via Firebase Test Lab on every PR.
None of this is glamorous. All of it adds up. The teams we work with stop firefighting and start shipping features.
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