See rest time from the Lock Screen
The active countdown can remain available through an iPhone Live Activity while you use another app or lock your device.
Gym rest timer app for iPhone
Your next set, right on time.
LiftBook keeps an adjustable rest countdown inside your strength workout, with optional alerts and a Live Activity when you leave the app.
- Default or per-exercise timing
- Adjust by 15 seconds or skip
- Local alerts and Live Activity
Part of the workout
Rest timing without switching apps
A separate stopwatch makes you manage two tools during every session. LiftBook attaches the countdown to the workout and starts the configured rest period when you complete a set.
-
01
Choose a default
Set the duration new rest timers should use from Workout Preferences.
-
02
Adapt each exercise
Give an exercise its own rest duration when it needs more or less recovery.
-
03
Complete the set
Mark a set complete and keep the active countdown visible with your workout.
-
04
Adjust as you train
Add or subtract 15 seconds, or skip the timer when you are ready to continue.
Stay aware
Keep the countdown beyond the app
Adjust without reopening the workout
Live Activity controls let you add time, subtract time, or skip the current rest period.
Get an optional local alert
If you enable notification permission, iOS can alert you locally when the rest timer ends.
Return to the active session
The timer stays associated with the workout instead of becoming an unrelated countdown.
More than a stopwatch
Keep timing, sets, and history together.
LiftBook combines its rest timer with routines, reps and weight entry, completed sets, and local workout history.
Questions
Gym rest timer FAQ
Can I change the default rest duration?
Yes. Workout Preferences lets you choose the default duration used by new rest timers.
Can different exercises use different rest times?
Yes. An exercise in the active workout can override the default rest duration.
Can I adjust a timer after it starts?
Yes. You can add 15 seconds, subtract 15 seconds, or skip the current timer.
Will the timer alert me outside LiftBook?
Optional local notifications can alert you when rest ends, and the countdown can appear as an iPhone Live Activity when supported and enabled.
Ready for the next set?
Put the rest timer inside your workout.
Download LiftBook for iPhone and keep your sets, recovery time, and workout history in one focused place.
