Master Your Tempo,
Maximize Your Gains

The first timer app designed specifically for time under tension training. Perfect every rep with precision timing, audio cues, and haptic feedback.

3-1-3-1 Perfect Hypertrophy Tempo

±50ms Timer Accuracy

100% Offline Capable

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Stop Counting, Start Growing

Current fitness apps treat tempo as an afterthought. Athletes resort to counting in their heads or using generic timers—leading to inconsistent training and frustration.

❌ The Old Way

Lose count during slow reps
Inconsistent tempo execution
Cognitive load during sets
Generic timer apps
No exercise-specific features

✅ With TimeUnderTension

Perfect rep counting every time
Precision tempo guidance
Audio/haptic feedback
Built for TUT training
Works with phone in pocket

Built for Serious Lifters

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Precision Timing

±50ms accuracy with frame-perfect timing. Never lose track of your tempo again.

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Audio Guidance

Distinct sounds for each exercise phase. Train with your phone in your armband or pocket.

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Haptic Feedback

Feel the rhythm through tactile cues. Perfect for noisy gym environments.

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Exercise Library

Pre-loaded with popular exercises and muscle groups. Add your own custom movements.

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Instant Setup

Quick presets for Hypertrophy, Strength, Endurance, and Rehabilitation training.

Trusted by Physiotherapists & Medical Professionals

Precision timing isn't just for athletes—it's critical for safe, effective rehabilitation and injury recovery.

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Controlled Movement Patterns

Ultra-slow 5-2-5-2 tempos ensure complete muscle control during the most vulnerable recovery phases.

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Prevent Re-Injury

Consistent timing eliminates the guesswork and prevents patients from rushing through critical movement phases.

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Track Recovery Progress

Monitor time under tension progression as patients safely increase load and reduce assistance over time.

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Audio Guidance During Therapy

Therapists can focus on form correction and spotting while the app provides consistent timing cues.

"Having precise timing control is essential for safe rehabilitation. Patients can focus on movement quality while the app ensures they don't rush through the eccentric phase—where most re-injuries occur." — Sports Physiotherapy Applications

5-2-5-2 Rehab Tempo Ultra-controlled movement for safe recovery

±50ms Precision Medical-grade timing accuracy

100% Consistent No human error in timing

Critical Rehabilitation Phases

5s Concentric Controlled muscle contraction

2s Hold Peak contraction stability

5s Eccentric Critical lengthening phase

2s Rest Recovery between reps

Science-Based Tempo Patterns

Hypertrophy

3-1-3-1

Optimal muscle building tempo with controlled movement and brief pauses

Strength

2-0-4-0

Explosive concentric with slow eccentric for maximum strength gains

Endurance

2-2-2-2

Balanced timing for muscular endurance and metabolic conditioning

Rehabilitation

5-2-5-2

Ultra-controlled movement for injury recovery and motor pattern development

Master Your Tempo,Maximize Your Gains