The Athlete's Timer

Your rest periods are lying to you.

Complex tracks what other timer apps ignore — how long you actually rest, when you drift, and what it costs your workout. Eight precision timers. Zero guesswork.

← BACK RESTING SET 4
WORKOUT TIME
14:23
REST TIME
01:52
IN ZONE · OPTIMAL
NEXT SET →
FINISH WORKOUT

Two minutes turned into five. Again.

You planned two-minute rests. But you checked your phone, replied to a text, scrolled a feed. Research shows rest duration directly determines whether you're training for strength, hypertrophy, or endurance — and most people just wing it.

1:32
Set 1
1:48
Set 2
2:22
Set 3
2:58
Set 4
3:41
Set 5
4:47
Set 6
Why Complex

Built for the gym floor, not the app store screenshot.

Rest Drift Detection

Every rest period compared to your running average. Green when you're in zone. Amber when drifting. Red when you've over-rested. Science-backed thresholds — not guesswork.

Post-Workout Insights

Consistency scores, rest bars color-coded against your goal, and science-backed insights after every Set Workout. Two lines of data, not a lecture.

64

Glanceable Digits

64-point monospaced digits readable from across the gym. Phase-aware backgrounds shift warm-to-cool. Never pick up your phone to check the time.

01:24
Resting
Live Timer

Glanceable from across the gym.

A depleting ring. Phase-aware color shifts. Zone-based backgrounds that go from calm green to warning amber to alarm red. You'll always know exactly where you stand — and by how much.

Rest drifting +38%
Above your running average of 1:48
Timer Modes

Eight timers. Every protocol. One app.

Set Workout
Rest tracking with drift detection & post-workout insights
Intervals
HIIT & Tabata with presets
EMOM
Every minute on the minute
Rounds
Round / rest cycling for fighters
Yoga
Pose holds and flow sequences
Countdown
Simple countdown timer
Stopwatch
Count-up with centisecond precision
Lap Timer
Split recording with fastest/slowest highlighting
Post-Workout

See exactly where discipline held.

After every Set Workout, get a breakdown of your rest periods — each bar color-coded against your training goal. Consistency score. Average rest. And a science-backed insight that tells you what the data means for your progression.

92% CONSISTENT AVG REST 1:48 6 SETS
WORKOUT COMPLETE
Tue, Apr 01
14:23
Duration
6
Sets
1:48
Avg Rest
92%
Consistency
5/6
In Zone
2:58
Longest
REST PERIODS
Set 1→2
1:32
Set 2→3
1:48
Set 3→4
2:22
Set 4→5
1:44
Set 5→6
1:36
💡INSIGHT
Strong consistency at 92%. One drift in set 3 — your average held well within the hypertrophy window.
0
Timer Modes
0%
Avg Rest Drift
Music Interruptions

Consistency wins. Complex tracks it.

Pay once. Eight timer modes. Full analytics. No subscriptions. Your timer, forever.