How to collect details of external user who doesn’t require sign in (Public app)

Need to sort, format label, Series, etc in the chart but no customization options available.

I want to design my form (Questions) in the following format where an employee selects [ID] 1 and all related Sub ID are populated (as shown below A,B,C,D,etc) and against each [Sub ID], i want the employee to capture a [Comment]. Please suggest. Tha...

How fill the entire column in google sheet for the old entries as well after Prediction? I have taught the app for 3000 entries but app sheet shows prediction from 3001st entries. I want its learning data in a column to compare 3000 predictions vs ac...

How much data can appsheet could handle? Does it also have capacity equivalent to that of Google sheet? Or less than that? Howmuch exactly?