Interval Timer

OnlySmart Interval Timer is a feature-rich interval timer app for Android, combining

workout training, productivity techniques, and custom interval routines in one

elegant, offline-ready package.

Whether you need a Pomodoro timer for focused work, a Tabata timer for

high-intensity exercise, a HIIT timer for cardio sessions, or a fully

customizable interval countdown — OnlySmart Interval Timer has you covered.

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5 BUILT-IN PRESETS

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🍅 Pomodoro Timer

25 min work · 5 min short break · 4 cycles

The most proven productivity and time management technique.

Ideal for students, programmers, writers, and remote workers.

⚡ Tabata Interval Timer

10 sec prep · 20 sec work · 10 sec rest · 8 rounds

The original high-intensity interval training (HIIT) protocol.

Science-backed workout timer for maximum athletic performance.

🔥 HIIT Workout Timer

10 sec prep · 45 sec work · 15 sec rest · 12 rounds

High-intensity interval training countdown for cardio, strength,

CrossFit, boot camp, and circuit workouts.

📖 Study Break Timer

Structured work-rest intervals for extended study or work sessions.

Stay sharp over hours, not just minutes.

💪 Workout Timer

Fully flexible fitness timer for any sport, drill, or training format.

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CUSTOM INTERVAL TIMER BUILDER

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• Custom work time — set any duration in seconds or minutes

• Custom rest time — dial in exact recovery intervals

• Custom rounds — from 1 to unlimited

• Custom cycles — group rounds into cycles (perfect for Pomodoro variants)

• Preparation phase — countdown before your first work interval

• Cool-down phase — wind-down period after your last round

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FULL FEATURE LIST

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✅ Phase-change notifications (work → rest → prep transitions)

✅ Vibration haptic feedback on interval changes

✅ Audio sound cues timed to your intervals

✅ Complete session history with duration statistics

✅ Dark Mode and Light Mode (Material 3 design)

✅ Smooth animated transitions between phases

✅ Color-coded timer phases for instant recognition

✅ Offline mode — no internet, no account, no tracking

✅ Multi-language support (English, Russian)

✅ Lightweight and fast — never slows your device

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USE CASES

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✓ HIIT and interval training workouts

✓ Tabata, CrossFit, and circuit training

✓ Pomodoro productivity and time-blocking

✓ Boxing, MMA, and combat sport rounds

✓ Yoga, Pilates, and stretching sessions

✓ Meditation and mindfulness intervals

✓ School study and exam preparation

✓ Personal training and coaching sessions

Free. No ads. No subscriptions. Download once, use forever.

OnlySmart Interval Timer — every interval, perfectly timed.