https://www.theregister.co.uk/2020/01/28/google_app_shut_down/

Google App Maker, which lets people build simple web-based applications using a graphical user interface, will be axed early next year.

The so-called low-code platform will slowly wind down before grinding to a halt on January 19, 2021, Google announced on Monday. Apps created on App Maker will continue to function for the next 10 months, though no new apps can be made after April 15 this year. Users can continue editing and deploying all existing apps created before April 2020 up until the whole platform is discontinued early next year.