25 free lifetime codes for a CW/Morse trainer app I built (Koch method + exam practice) — want your feedback

Built Ditdah as a CW trainer: Koch method progression, listening practice, and exam-style simulation for license prep. Got 25 free lifetime codes set aside for this sub. If you want to try it and tell me straight what's wrong with it (or right), comment or DM me.

Link: https://apps.apple.com/us/app/ditdah-cw-morse-code-trainer/id6784385907

Curious what this sub thinks is missing from most CW training apps — feel free to weigh in even if you don't want a code.