Your app starts
right here.

A Mac workspace for building native apps with your AI agent. Shape the screens, see every change and take your project all the way to a build.

Join the preview

For Mac. Build for iOS, Android and web.

Appmost workspace showing Still Horizon’s music app on folded iPhone Duo — Explore iPhone Duo

Make it yours.
Down to the details.

Choose native components, adjust your colors and work with real app data. Every change appears in the preview, right beside your tools.

Still Horizon in Appmost with the Add component side panel open beside the music app preview — Add labels, images, buttons and controls from the component panel while keeping the screen in view.

Still Horizon’s page settings inspector in Appmost, showing background, navigation and layout controls beside the preview — Set backgrounds, navigation and layout in the page inspector.

Appmost’s Colors inspector open beside Still Horizon on folded iPhone Duo — Tune the app’s shared colors and review the result in the preview.

Still Horizon’s populated Variables workspace in Appmost, including saved favorites and playback state — Manage real app values, from saved favorites to playback state.

A little screen.
A bigger possibility.

Open it. Fold it. See how your app adapts. Explore the same design on a compact screen and a wider canvas with Appmost’s 3D iPhone Duo preview.

Explore the Duo preview

Genuine Appmost export: Still Horizon’s music artwork, player and navigation in the expanded iPhone Duo preview — The expanded preview gives the album artwork and listening library more space.

Genuine Appmost export: the Still Horizon design partway through the 3D iPhone Duo fold preview — Inspect a folding pose with Appmost’s 3D preview controls.

Genuine Appmost export: Still Horizon in the compact iPhone Duo preview with its color settings open on the right — Still Horizon in a compact layout, with its color settings open in Appmost.

One project.
Ready to go further.

Take the same project to iOS, Android and the web. Prepare signing, create a build and send it to TestFlight or Google Play internal testing — all from Appmost.

Appmost’s iOS Publish workspace showing the Appmost Demo organisation, signing setup and Build and publish to TestFlight action — Prepare signing and send an iOS build to TestFlight. TestFlight upload guide.

Appmost’s Android Publish workspace showing Google Play internal testing, the Appmost Demo organisation, signing readiness and Build and publish to Google Play action — Choose your Google Play organisation and build a signed release for internal testers.

Appmost’s Web Publish workspace showing an Appmost account and Firebase project, a demo Hosting destination and Publish website action — Choose a connected account, Firebase project and Hosting site, then publish your web app.

Your favorite agent.
Your own app.

Keep working with Codex or Claude Code. Connect to Appmost on your Mac, describe a change and review it in the native preview. Your project stays in your hands.

OpenAI CodexConnect Codex to the project on your Mac. Claude CodeSet up the local bridge and check your first connection.

What will you make?

Join the preview list for access to Appmost and news about the launch.

Your app startsright here.

Make it yours.Down to the details.

A little screen.A bigger possibility.