FitNotes

Developer DuarteSantos8 has released openGym, a self-hosted JavaScript application for planning routines and logging gym and body-weight workouts. It supports supersets, warm-ups and cardio, shows which muscles are trained, fatigued or detraining, imports data from FitNotes, Strong and Hevy, and offers passkey login. The pitch is data ownership: users keep everything on their own server.