Editing a Google Sheet via an app (AppSheet)

TLDR: I hesitate to recommend this to anyone as it’s finicky to set up and may go away, but just in case: Google Sheets has an “Extensions -> AppSheet -> Create an app” that gives an easier interface for editing a sheet from phone (stuff like updating a daily habit tracker or whatever).

Last year, I made a “2025 daily tracker” in Google Sheets, where I updated some data every day (like a daily habit tracker). It is not very convenient to edit Google Sheets using a phone, but it turns out Google Sheets comes with something called “AppSheet” that can make this slightly easier. This being a feature that is apparently not very well known (and therefore not much used), I expect it to go away at some point, but for now, the following is how it works.