Fractal Studio: Fitness

Fractal Studio: Fitness (FS:Fit) is a gym workout log for iPhone built for people who want to train without handing their data to a cloud service.

Features

Log workouts fast — Build routines from templates, log sets in a tap, and see what you lifted last time. Supersets and drop sets included.
Rest timer — Starts automatically after each set and alerts you when it’s time to go, even with the screen locked.
Progress and history — Every session, personal records and trophies, on a calendar.
Apple Health — Saves active calories to Apple Health and reads heart rate, weight and height.
Private by design — No account. Workouts, history and health data stay on your device.

An optional monthly or annual subscription unlocks:

Apple Watch app — Complete sets, follow your rest timer and track heart rate from your wrist.
Garmin watch app — Follow your workout and stream heart rate from a Garmin watch.
Unlimited templates (the free version includes 5).
Guided HIIT, cardio and stretching with intervals and heart rate zones.
Bluetooth heart rate monitors with live zones.

Available for iPhone.