Your watch tracks the body. Lift tracks the bar.

How the match works

Lift does not run on the watch. Instead it asks Apple Health for the workout that overlaps your Lift session in time. When you end the session, Lift finds the matching watch workout, takes average heart rate, peak heart rate, active calories and duration, and shows them on the session summary and in history. If you forgot to start the watch, the session is still complete; it just has no heart-rate line.

Writing back to Health

Every finished Lift session is written to Apple Health as a traditional strength training workout with its duration. Your Fitness rings and any other app that reads Health see the session. If a watch workout already covers the same time, Lift does not create a duplicate.

Permissions, plainly

Lift asks for read access to workouts and heart rate, and write access to workouts, once, at the moment you first turn the integration on. You can decline and use every other part of the app. You can change the choice any time in Settings, Privacy & Security, Health. Lift never asks for other Health categories.

Where the data goes

Raw Health data is read on the phone and stays there. If you use Lift Pro sync, a short per-session summary (average and peak heart rate, calories, duration) is stored with that session so the web dashboard can show it. Heart-rate samples themselves are never uploaded. The privacy policy spells this out.

Why heart rate on a lifting log

It is not a fitness score. It is context. The same session at a lower average heart rate a month later is a sign of fitness. A very high peak on a set you thought was easy is a sign to check your bracing. Rest periods in the rest timer are where you see recovery between sets, and over time, whether ninety seconds is really enough.