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buildbyalex

Mobile apps

Mobile apps thatactually ship to stores.

MVP in 4–8 weeks, both platforms from one codebase, store submission included.

Discuss the ideaFrom €3,000

Tech stack

  • React Native
  • Expo SDK 52
  • TypeScript
  • Firebase / Supabase
  • Stripe
  • RevenueCat
  • Sentry
  • EAS Build
  • Swift (native modules)
  • Kotlin (native modules)

What you get

iOS + Android out of the box

One codebase, two stores, one build pipeline. No separate teams per platform.

Auth, payments, push

Apple Sign-In, Google, magic-link, Stripe, RevenueCat for subscriptions, Expo Push — the standard kit ready.

Backend

Firebase / Supabase / Node.js — we pick per case. With native rate-limiting, auth and validation.

Submission

I handle App Store Connect and Google Play Console — beta tracks, screenshots, metadata, review responses.

OTA updates

Via EAS Update — patches ship in minutes without a new store release.

Analytics

Firebase Analytics, PostHog, Sentry — everything you need to understand what's happening with users.

Questions about mobile

  • For 90% of product tasks — no. Expo / React Native gives native perf and full hardware access. Native code makes sense only for AR, heavy graphics or specialized hardware. I'll tell you honestly.

  • I do. Including review responses. Apple Developer Account and Google Play Console under your legal entity — I work under your accounts.

  • Typically 4–6 weeks from kickoff to TestFlight / Internal Testing. Another 1–2 weeks to the public stores (depends on Apple review).

  • Standard, not scary. I've been through review enough times to usually predict what they'll ask. If they reject — we fix and resubmit, no extra charge.

  • Yes. Expo Router lets one codebase target iOS + Android + Web. If your product goes that way, the path is short.

Mobile App Development — iOS and Android — buildbyalex