Build your app is an Android application that generates functional mobile apps from a single sentence description. The user tells the tool what they want in plain language, either by typing or speaking, and the tool automatically writes, tests, and installs the resulting app on the user's phone. The development process takes a few minutes, and the user can leave the app while it works. When the build is complete, the app appears alongside other installed applications. The generated apps can be modified through natural language requests, such as asking for larger elements or additional counters, and the tool rebuilds and rechecks the app accordingly. Users can publish their finished apps to the Discover section, where anyone can install them for free. Remixing is also supported: a user can take an existing app from Discover, pay a credit fee to make it their own, and then modify it. The original creator receives half of the remix fee and ten percent of any subsequent spending on changes. Credits are only deducted when an app is successfully delivered; failed builds incur no charge. Most first apps cost between 5 and 25 credits, while changes usually cost 5 to 10 credits. Every build is scanned before installation and checked again each time it runs. Apps and their data remain stored on the user's phone, and deleting an app removes its data as well. Speech input uses the phone's own speech service, and only the resulting text is transmitted, never the audio. Shared apps can include an invite link that allows up to 50 people to receive the same list, board, or score, with updates reaching each phone within a few seconds. The tool is currently available only on Android and is free on Google Play.