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How to Choose Your Mobile App Tech Stack
Start with Team Skills
The best tech stack is one your team can actually use. If you know TypeScript, React Native + Expo is almost always the right answer. If you know Dart, Flutter. Don't pick a stack you'll have to learn while shipping — that's how MVPs turn into year-long projects.
Match Stack to Timeline
Short timelines force you onto managed services. Supabase, Expo Application Services, RevenueCat, Sentry — these tools each save you weeks. If you have 4 weeks to ship, you cannot also be building auth from scratch. Pick boring, batteries-included tools that ship.
Build for Realistic Scale
Build for the next 12 months, not for hypothetical millions of users. The default mobile stack (React Native + Supabase) comfortably handles 100k MAUs. Most apps never get that far. Optimize when you have a real scaling problem, not before.
Budget for the Right Things
Pay for managed services that save engineering time. EAS at $19/mo replaces hours of build setup. Supabase Pro at $25/mo replaces a whole backend team. Sentry at $26/mo prevents production incidents from becoming customer disasters. Underinvest in tooling and pay in dev hours.
Avoid Premature Microservices
A mobile app rarely needs microservices on day one. One Postgres database, one API service, one mobile client. You can split into services when team coordination or scaling requirements demand it — almost never before reaching $1M ARR.
Recommended Stacks by App Type
Starting points by category. Adjust based on your team, scale, and constraints.
| App Type | Stack | Why |
|---|---|---|
| Subscription / SaaS | RN + Expo + Supabase + RevenueCat | RevenueCat handles iOS/Android receipt validation, retries, and analytics out of the box. |
| E-commerce / Marketplace | RN + Expo + Supabase + Stripe Connect | Stripe Connect is the standard for marketplace payouts and split payments. |
| Social / UGC | RN + Expo + Supabase + PostHog | Postgres realtime + Supabase Storage cover feeds, posts, and media at scale. |
| Health / Fitness | RN + Expo + Supabase + RevenueCat + HealthKit | HealthKit/Health Connect integration is straightforward via Expo modules. |
| Chat / Messaging | RN + Expo + Supabase Realtime or Stream Chat | Stream Chat for production-grade chat; Supabase Realtime for simpler use cases. |
| Enterprise / Healthcare | RN + Expo (bare) + AWS (Cognito + RDS + S3) + Datadog | AWS provides HIPAA-eligible primitives; Datadog covers compliance-grade observability. |
React Native + Expo vs Alternatives
Why React Native + Expo is the pragmatic default — and when alternatives win.
| Option | Best For | Tradeoffs |
|---|---|---|
| React Native + Expo | Most apps. JS/TS teams. Fast shipping. | Custom native modules can require ejecting from managed workflow. |
| Flutter | Pixel-perfect cross-platform UI. Dart teams. | Smaller ecosystem than RN. Dart talent harder to hire. |
| Native iOS (Swift) | iOS-only apps. Heavy 3D, AR, or platform-specific features. | 2x dev cost — separate Android codebase. Slower iteration. |
| Native Android (Kotlin) | Android-only or platform-specific Android apps. | Same 2x cost problem. Most apps need iOS too. |
| Capacitor / Ionic | Existing web teams. Internal apps. Simple UIs. | Webview-based — slower, less native-feeling than RN/Flutter. |
| PWA | Internal tools. Content-heavy apps. No app store needed. | No app store discovery. Limited iOS push and integration support. |