Track attendance within the app
In other words, Coachstuff doesn't need to be separated from Teamstuff. It should all be integrated in one app, take / modify attendance at the fields and keep a record.
Also, like another user suggested but you declined, tardiness should be tracked as well! Not just in a note, but in a way that data is usable on its own. It should be Attended, Attended but late, Absent without notice, Absent with notice. It should all be in a database and data should be usable for reports.