... users can fully solve their problem for free, they won t upgrade. So free should feel useful, but slightly incomplete. Your general vs specific approach is already a very solid way to think about it Comment from Casper Echo(@pan_zo): Great question! As a builder of a personal safety app

... app is called Revision.Quest and I built it in a hurry for my son to revise for his GCSEs earlier this year. It s still unfinished, and maybe I ll never finish it, but it works reasonably well and, of course, he no longer needs it since the exams finished. It also has an AI subject matter testing mode, just because. My second app