I built a free iOS app so cyclists can stop paying $20/mo just to retest their FTP. The ramp test itself is a 25-minute Bluetooth interaction with a known protocol. It shouldn't require rent. This app is opensource, free, no ads, no tracking nor third party integrations because I just wanted to have a fun side project and have no interest in monetization.

If you are a cyclist, I would kindly ask for feedback on the app especially on the ftp test protocol instructions, trainer-model compatibility, and bug reports

App store link: https://apps.apple.com/de/app/better-ftp/id6766080601

GitHub (opensource project): https://github.com/niecore/betterftp

Demo gif: https://betterftp.cc/promo.gif