Actually, the web application already exists to a great degree.
The big tasks left are:
Why not use a big XLSX?
It's really hard to enter data into an XLSX on a smartphone. Also, I guess you can say that a MySQL database table has a lot of similarities with a spreadsheet so, in that way, I am.
This is the public group instrumental rationality diary for July 16-31.
Thanks to cata for starting the Group Rationality Diary posts, and to commenters for participating!
Immediate past diary: July 1-15
Next diary: August 1-15
Rationality Diaries archive