SimpleHIIT - 4 Minute Timer

4 MINUTES. SCIENTIFICALLY PROVEN. HIGHLY EFFECTIVE.

High-Intensity Interval Training (HIIT) is a scientifically proven workout method that delivers maximum results in minimum time. Research shows HIIT can deliver significant cardiovascular benefits in a fraction of the time of traditional cardio.

SimpleHIIT is the simplest way to practice this proven HIIT protocol.

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WHY SIMPLEHIIT?

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[1. ZERO CONFIGURATION]
Open the app. Tap to start. That's it.

- Preparation: 10 seconds
- Work: 20 seconds
- Rest: 10 seconds
- Sets: 8 rounds
- Total: about 4 minutes

This is the scientifically optimized HIIT protocol.

[2. MULTI-SENSORY FEEDBACK]
- Visual: Phase-specific colors (Green = Work, Orange = Rest)
- Audio: Clear alerts for phase transitions
- Haptic: Vibration feedback synced with countdown

Know exactly what to do without looking at your screen.

[3. MUSIC FRIENDLY]
Keep listening to your favorite music or podcasts.
Timer sounds coexist with your audio - no interruptions.

[4. BACKGROUND OPERATION]
Timer keeps running accurately even when using other apps.
Push notifications alert you to phase changes.

[5. BEAUTIFUL & INTUITIVE]
Clean dark-mode interface.
Large numbers and progress rings - visible even mid-workout.

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PERFECT FOR

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- Busy professionals with no time for the gym
- Remote workers fighting sedentary lifestyle
- Anyone tired of complicated fitness apps
- Morning routine optimizers
- Science-backed fitness seekers

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HIIT BENEFITS

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- Improves both aerobic and anaerobic capacity
- Maximizes fat burning efficiency
- Boosts cardiovascular health
- Increases metabolism
- Triggers afterburn effect (EPOC)

All in just 4 minutes.

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PRICING

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SimpleHIIT is free to use.
All workout features are available without any limitations.

- Remove Ads: Optional in-app purchase
- Support Development: Buy the developer a protein shake if you love the app

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START NOW

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Download. Tap. Transform.
Your 4 minutes start here.