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Short answers

Direct answers to questions founders type into Google, ChatGPT, and Perplexity. Each page starts with the sentence you can cite — then the nuance.

AI products

Prototype → production

Web, mobile & SaaS

Should I use Next.js or React for an MVP?

React is the UI library. Use Next.js if you have public pages, SEO, or want marketing + app in one repo. A Vite React SPA is fine for a login-only dashboard.

How do I build a web app in 2026?

Write the one user job. Then Next.js, hosted Postgres, real auth, Stripe if you charge, error tracking, and a host you can roll back. No microservices. No AI builder if strangers will pay.

How do I build a SaaS MVP?

A SaaS MVP is one workspace model, auth, Stripe, and one resource table for the job. Next.js + Postgres is enough. Cut admin theatres and “also an AI platform.”

Should I build web or mobile first?

Web first if the job happens at a desk or you need Google. Mobile first if camera, push notifications, or App Store distribution are the product. Doing both in week one doubles the surface.

How do I build a mobile app?

Most startups should build a mobile app with React Native + Expo — one codebase for iOS and Android — then submit with a reviewer demo account. Use native Swift/Kotlin only when a device API requires it.

How do I build an iOS app?

Enroll in the Apple Developer Program, build with Expo (or Swift if iOS-only), ship a complete loop, use StoreKit for digital purchases, and give App Review a working demo login.

How do I build an Android app?

Create the Play listing, build with Expo unless you need Kotlin, use Play Billing for digital goods, and test on mid-range Android — not only a flagship.

React Native or native for an MVP?

React Native + Expo for most MVPs: one team, both stores, TypeScript if you also have a Next.js web app. Native Swift or Kotlin when a specific device capability is the product.

Cost & time