I'm new to Android development. My project has an existing website hosts by Squarespace platform, users can register by filling a form in the website and it will send these information to Google sheets(which is a default function for Squarespace). I am developing an android app that both existing users and new users can register via app. To get the existing user information I need to pull the data from Google sheets, and for new users I need to update their information in the Google sheets. My trouble is how to coect to Google sheets in Android Studio? Most software has this service charges, is there any free or open source can do this?
