Every time I mention building apps in Flutter, someone asks why I didn't just go native, or why not React Native since it's more widely used. It's a fair question, and the honest answer is that it depends entirely on what you're optimizing for. Here's what actually tipped the decision for me, based on building and shipping a real app rather than a tutorial project.
One Codebase, Genuinely One Codebase
React Native markets itself as "write once, run anywhere," but in practice a lot of real-world RN projects end up with platform-specific escape hatches for anything beyond basic UI — native modules, bridging code, and packages that behave differently on iOS versus Android. Flutter's rendering engine draws its own UI from scratch instead of mapping to native components, which sounds risky on paper but in practice means far fewer "works on Android, broken on iOS" surprises.
For a solo developer or a small team, that consistency is worth a lot. I don't have the bandwidth to maintain two UI implementations, let alone debug platform-specific rendering bugs.
Performance Without the Native Overhead
Native development (Kotlin/Swift separately) gives you the best possible performance and the tightest integration with platform APIs, full stop. But it also means maintaining two completely separate codebases, two sets of bugs, and twice the review cycles. Flutter compiles to native ARM code (not an interpreted bridge like older RN versions), so the performance gap is smaller than people assume — smooth 60/120fps animations, fast cold starts, and no visible "bridge lag" when passing data between Dart and native code.
For an app like SkyCast Pro, where smooth weather animations and fast scrolling matter to how premium the app feels, that performance ceiling mattered more than I expected going in.
The Ecosystem Is Smaller, But Denser
Flutter's package ecosystem (pub.dev) is smaller than npm's, which is both a pro and a con. The con is obvious — sometimes a package you want just doesn't exist yet. The pro is that the packages that do exist tend to be well-maintained, because the community is more concentrated. I've had far fewer "this package was abandoned two years ago" moments in Flutter than I had in earlier React Native projects.
Where I'd Still Pick Something Else
I won't pretend Flutter is the right answer for everything. If an app genuinely needs deep, constant integration with brand-new native platform features the day they launch, native development still has the edge — Flutter's plugin layer has to catch up to new OS APIs, and that lag is real. And if a team already has strong React web developers and wants to reuse that skill set directly, React Native's shared JavaScript mental model is a legitimate reason to pick it over learning Dart from scratch.
For a solo or small-team app where consistency, performance, and development speed matter more than bleeding-edge platform integration, Flutter has been the right call for me — and SkyCast Pro is the proof I keep pointing to.