Jern

Jern is a fast, no-nonsense workout tracker for lifters who want to log sets, track progress, and get out of the gym. - Build routines and start a workout in one tap - Log weight and reps per set, with built-in rest timers - See your estimated 1RM and volume trends per exercise - Attach a photo to any exercise for form reference - Optional AI coaching tips in the Coach tab (bring your own Gemini API key) - Optional Oura integration for recovery-aware coaching No account required. No ads. No tracking. Your training data stays on your device.