Build plan

Mobile app build plan

Mobile app build plan using Cursor as the primary builder, with 5 supporting tools for a complete production stack.

Mobile AppB2CFreeSome Coding

Your tech stack

Builder

Cursor

AI code editor — generates and edits code from natural language

UI Generation

v0 by Vercel

Generate production-ready React components from text descriptions

Framework

Expo (React Native)

React Native framework for cross-platform iOS and Android

Database

Supabase

Postgres database with auto-generated REST API

Auth

Supabase Auth

Built into Supabase — social login, email/password, magic links

Analytics

PostHog

Product analytics with session replay and feature flags

Build steps

Scaffold the project

Set up Expo (React Native) with Supabase and project structure.

CursorExpo (React Native)Supabase

"Create a Expo (React Native) app with TypeScript, Tailwind CSS, and Supabase client. Set up environment variables and a reusable layout with navigation."

"Generate the database schema for: A fitness tracking app for iOS and Android. Create migration files with tables, relationships, indexes, and row-level security policies."

Watch out

Overengineering the schema — start with 3-5 core tables maximum
Hardcoding config instead of using environment variables from the start

Set up authentication and data model

Configure Supabase Auth for user accounts and define core data tables in Supabase.

Supabase AuthSupabase

"Set up Supabase Auth with email/password and Google social login. Add sign-up, sign-in, and a user profile page."

"Add protected routes — redirect unauthenticated users to the login page. Store user preferences and profile data in Supabase."

Watch out

Not protecting API routes — add auth middleware from day one
Missing row-level security policies on database tables

Build the core feature

Implement the main user flow — the single thing that makes this app valuable.

Cursor

"Build the primary feature for: A fitness tracking app for iOS and Android. Focus on the happy path — make it work end-to-end with real data before adding edge cases."

"Add form validation, loading states, success/error feedback, and empty states for the core flow."

Watch out

Building three features before one works well — finish the core loop first
No loading states or error handling — users will think the app is broken

Deploy, instrument, and launch

Ship to production and start tracking usage with PostHog.

PostHog

"Deploy to production. Set all environment variables. Configure the deployment pipeline."

"Add PostHog tracking for: sign-up completed, core feature used, and key drop-off points. Set up a dashboard to monitor these."

Watch out

Launching without any analytics — you'll be flying blind
No error monitoring — add Sentry or similar so you know when things break

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https://vibefactory.dev/plans?idea=A%20fitness%20tracking%20app%20for%20iOS%20and%20Android&pt=mobile&aud=b2c&rev=free&feat=&exp=some

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Build steps

Scaffold the project

Set up Expo (React Native) with Supabase and project structure.

CursorExpo (React Native)Supabase

"Create a Expo (React Native) app with TypeScript, Tailwind CSS, and Supabase client. Set up environment variables and a reusable layout with navigation."

"Generate the database schema for: A fitness tracking app for iOS and Android. Create migration files with tables, relationships, indexes, and row-level security policies."

Watch out

Overengineering the schema — start with 3-5 core tables maximum
Hardcoding config instead of using environment variables from the start

Set up authentication and data model

Configure Supabase Auth for user accounts and define core data tables in Supabase.

Supabase AuthSupabase

"Set up Supabase Auth with email/password and Google social login. Add sign-up, sign-in, and a user profile page."

"Add protected routes — redirect unauthenticated users to the login page. Store user preferences and profile data in Supabase."

Watch out

Not protecting API routes — add auth middleware from day one
Missing row-level security policies on database tables

Build the core feature

Implement the main user flow — the single thing that makes this app valuable.

Cursor

"Build the primary feature for: A fitness tracking app for iOS and Android. Focus on the happy path — make it work end-to-end with real data before adding edge cases."

"Add form validation, loading states, success/error feedback, and empty states for the core flow."

Watch out

Building three features before one works well — finish the core loop first
No loading states or error handling — users will think the app is broken

Deploy, instrument, and launch

Ship to production and start tracking usage with PostHog.

PostHog

"Deploy to production. Set all environment variables. Configure the deployment pipeline."

"Add PostHog tracking for: sign-up completed, core feature used, and key drop-off points. Set up a dashboard to monitor these."

Watch out

Launching without any analytics — you'll be flying blind
No error monitoring — add Sentry or similar so you know when things break