Assist Mapper is a free Android application developed by Amir Zaidi that allows you to customize the action that is triggered when you hold your phone's home button. By default, holding the home button would open Google Assistant, but with Assist Mapper, you can select any activity on your phone to launch instead.

With Assist Mapper, you can easily override the default action and customize it to your liking. This can be particularly useful for those who don't use Google Assistant or prefer to have quick access to a different app or feature. The app is user-friendly and easy to navigate, making it a great choice for anyone looking to personalize their Android device's home button.