Choose Your Device

The first decision the guide asks you to make: which phone are you building for first?

You can ship to both platforms eventually — most Mosayic apps do. But the setup guide and the Blueprint focus on one platform at a time so you don’t drown in instructions for two stores at once.

iPhone

Pick this if you have an iPhone (any model that supports the current iOS) and a Mac.

You’ll need:

• A Mac to do the iOS build (Apple’s tooling doesn’t run anywhere else)
• An Apple Developer account — $99/year. You can sign up at developer.apple.com.

You can defer the Apple Developer signup until after your first dev build is on your phone. The dev build itself works under your free Apple ID. You only need the paid program for App Store submission and TestFlight.

Android

Pick this if you have an Android phone, or you don’t have a Mac.

You’ll need:

• Any computer (macOS, Windows, or Linux)
• A Google Play Developer account — one-time $25. Sign up at play.google.com/console/signup.

Like the Apple equivalent, you can defer the paid signup until you’re ready to release. Dev builds work without it.

Tip

If you have both phones and a Mac, start with Android. The dev tooling (no provisioning profiles, no certificates, no TestFlight invites) is dramatically simpler and you’ll have a working build in your hand much faster.

Can I switch later?

Yes. The choice mainly affects which Blueprint cards are highlighted in the dashboard. You can always switch the device track in your project settings, or build for the other platform alongside the first one. The codebase Mosayic generates supports both from day one — Expo handles the cross-platform build for you.

What happens after you pick

The guide moves to the Welcome / Intro screen, then on to Connecting your services.