a0.dev is an AI mobile app builder that turns a chat conversation into a working iOS and Android app. An AI coding agent writes and edits the app in real time, with backend support from Convex or Supabase and built-in APIs for AI inference and image generation. When the app is ready, one-click publishing handles the build, creates the App Store Connect listing and uploads it, and the same codebase can go to Google Play, as an APK or to the web. Payments and subscriptions can be added from within the product, and an analytics dashboard tracks users and performance. The company reports 200,000+ users and 300,000+ apps created.
The product is aimed at solo makers, indie developers and first-time founders who have an app idea but do not want to set up Xcode or Android Studio. Developers comfortable with vibe coding use it to move from prompt to store listing quickly, and creators who want to earn from their apps appreciate the integrated payments. Small studios can use it to prototype game and utility concepts and test them on a real phone before investing in a native build. Backed by Y Combinator, it targets people who care more about shipping and growing an app than about configuring a toolchain.
Typical projects include simple games such as endless runners and rhythm tappers, utility and productivity apps, and subscription-based consumer apps. A builder describes a feature in chat, such as adding a dark mode, and the agent searches the codebase and makes the change. Data-driven apps connect to Convex or Supabase, while apps that need generated artwork call the built-in image generation API. When it is time to launch, the one-click flow prepares the store submission, and monetization and analytics help track subscriptions after release. The companion mobile app lets users test and edit apps from anywhere.
