<human>:  How do I build a mobile app from scratch?
<bot>: To build a mobile app from scratch, you will need to have a basic understanding of programming and code. You should start by creating a plan for what your app should do and how it should work. Then, decide on a platform for your app, such as Android or iOS. After that, begin learning the language of that platform, such as Java for Android or Swift for iOS. You will also need to decide on a design for the app and create wireframes for each page or screen. Once the plan and wireframes are set, you can start coding the app and use the relevant programming language and libraries for the platform you chose. Once the app is coded, you will need to test it to make sure it works properly. Finally, you will need to deploy the app and make it available to users.