Complex - Athlete's Timer

Precision timers to help you manage your time at the gym. Know when you're drifting. Know when you're staying focused. Pay once — no subscription, no limits.

Manage your time wisely at the gym.

That "two-minute rest" turned into five. Again. Research shows rest duration directly determines whether you're training for strength, hypertrophy, or endurance — and most people just wing it.

Complex fixes that.

SCIENCE-BACKED REST TRACKING Pick your training goal — Strength, Hypertrophy, or Endurance — and Complex sets your optimal rest window based on peer-reviewed research. During your workout, the timer shifts color in real time: green when you're in zone, amber when you're drifting, red when you've over-rested. No guessing. No scrolling. Just data.

EIGHT PURPOSE-BUILT TIMERS One app for every training style:

Set Workout — Dual-clock system tracking workout time and rest periods with live drift detection and post-workout consistency scores.

Intervals — HIIT and Tabata with customizable work/rest/rounds and preset configurations.

EMOM — Every-minute-on-the-minute with configurable intervals and work windows.

Rounds — Boxing round timer with fight/rest cycling for boxing, speed rounds, and Muay Thai.

Countdown — Simple countdown with quick-select durations and custom wheel picker.

Stopwatch — Count-up timer with centisecond precision.

Lap Timer — Split recording with fastest and slowest lap highlighting.

Yoga/Flow — Sequence-based pose holds with named poses, adjustable durations, and calm transitions.

POST-WORKOUT INSIGHTS After every Set Workout, see exactly where discipline held and where it slipped. Average rest, zone hit rate, rest period bars color-coded against your goal. Two lines of data, not a lecture.

COMPLEXES — SAVE YOUR SETTINGS Finish a workout and tap Save as Complex to capture your exact configuration as a reusable template. Organize templates into folders. Launch any saved complex with one tap — no setup screen, straight to work.

BUILT FOR THE GYM Giant monospaced digits readable from across the room. Never interrupts your music. Haptic feedback on every phase change. Screen stays on during workouts. Dark and light mode — use whichever suits your environment.

ANALYTICS INCLUDED Workout history with mode filtering, sort by recency or duration, and session detail views. Full analytics with charts and trends. All included, no paywall.

ONE-TIME PURCHASE Pay once. Every timer, every feature, forever. No subscription. No recurring charges. Complex is yours.

Consistency wins. Complex tracks it.