What it is
Tables with real field types, linked records, views and automations. For a coach it becomes a client roster where each row links to sessions, payments and notes, filtered into views like "renewal due this month".
Best for
Coaches with a process that no off-the-shelf CRM matches, and enough patience to model it once properly.
Watch out for
Record limits on the free tier arrive quickly if you log every session. And a database you built yourself is a database you maintain yourself — keep it simple enough that you will still update it in month six.