Ischys Workout Tracker

Track every set, run rest timers on your Lock Screen, and see live heart rate on your Apple Watch — 100% on your device. No account. No cloud. No tracking.

Ischys is a fast, private workout tracker for lifters. Every set, routine, and personal record lives entirely on your iPhone — no account, no cloud, no tracking. Your training data is yours.

BUILT FOR THE GYM • Log sets in seconds — weight, reps, warmups, drop sets, and supersets • Build routines and start them in one tap, or freestyle an empty session • A rest timer that keeps running when you leave the app — right on your Lock Screen • Auto-fills your last session's weights and reps, so you're not retyping • Personal records tracked automatically: heaviest set, best volume, most reps

APPLE WATCH • Start a workout on your phone and it runs on your wrist • Live heart rate and active calories during the session • Log sets, adjust rest, and end the workout from the Watch

YOUR DATA, YOUR DEVICE • 100% on-device — no account to create, nothing uploaded, no analytics • Import your history from other apps (CSV) and export it any time as JSON • Optional Apple Health: save finished workouts and read your heart rate

OPEN SOURCE Ischys is open source — see exactly what runs on your device at ischys.app.