// stack/mobile_app.md

# Mobile App MVP Tech Stack

// stack_breakdown

FrontendReact Native + Expo (iOS + Android)

BackendNestJS REST API

DatabasePostgreSQL

AuthSupabase Auth or Clerk

HostingEAS Build (Expo) + Railway (backend)

// cost_estimate

USD range $7,000–$24,000

INR range ₹6.5L–₹22.4L

Timeline 12–20 weeks

// why_this_stack[]

## Why This Stack

01.Expo eliminates the native build pipeline headache — OTA updates mean no waiting for App Store review for JS changes.

02.React Native shares component logic with a potential web app, so you are not starting from scratch if you add a web version.

03.NestJS REST API works well here — GraphQL adds complexity that rarely pays off at the MVP stage.

// mvp_features[]

—Onboarding flow with phone/email auth

—Push notifications via OneSignal or Expo Notifications

—Offline-first data sync with optimistic UI

—Deep linking and universal links

—App Store + Google Play submission setup

// risk_flags[]

!Apple review can take 3–10 days — never promise a hard launch date without buffer.

!Expo's managed workflow hits walls with certain native modules — audit dependencies before committing to managed.

Get a scope, timeline, and cost estimate tailored to your specific Mobile App project — free, no sign-up.

// related_resources