Interval Timer: HIIT & Circuit

Limit breaker studios

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About this app

Train 100% hands-free with the ultimate distraction-free Interval & Circuit Training Timer built for athletes and fitness enthusiasts. Whether you are doing High-Intensity Interval Training (HIIT), Tabata protocols, boxing rounds, calisthenics, EMOM, or home circuits, this timer keeps you focused on your form—not your phone screen.

✨ SMART AI ATHLETIC COACH
• Instant Custom Routines: Generate personalized HIIT, strength, conditioning, and boxing workouts tailored to your equipment, fitness level, and time.
• Form-First Coaching: Conversational coaching with Coach Apex for real-time exercise alternatives, warmups, and interval adjustments.
• Always Ready: The AI Coach uses an internet connection; if you're offline, built-in fallback routines keep you training.

🔊 HANDS-FREE AUDIO GUIDANCE & PACING
• Dynamic Voice Prompts: Clear Text-to-Speech announces exercises, sets, work phases, and halfway alerts.
• Background Music Friendly: Smart audio ducking softly lowers your Spotify, Apple Music, or podcast playback during audio cues instead of cutting your sound off.
• Rest Pacing Metronome: Continuous 1-second pulsing audio ticks keep your breathing steady and focused during recovery intervals.
• 3-2-1 Audio Chimes: High-contrast countdown beeps so you know exactly when to start and when to rest.

⚡ PRO INTERVAL MODES & FULL CUSTOMIZATION
• Classic HIIT & Tabata: Dial in exact work and rest intervals with smooth steppers.
• EMOM (Every Minute on the Minute): Complete reps and rest for the remainder of each minute.
• AMRAP (As Many Rounds As Possible): Push your maximum work capacity against a hard time cap.
• Dynamic Pyramid Training: Ascending and descending interval sequences (e.g. 30s → 45s → 60s → 45s → 30s).
• Dynamic Routine Builder: Add, reorder, or remove up to 15 custom exercise names announced by voice.
• "Get Ready" Countdown: 0–15s preparation buffer so you can set your phone down and get into position.

🔥 FAIR STREAK PROTECTION & ATHLETE LOCKER
• Fair Streak Protection: Schedule active training days vs. planned rest days. Rest days automatically protect your hard-earned streak from resetting!
• Grit Points & Locker: Earn Grit for every completed workout. Unlock futuristic Visual HUD themes (Cyber Neon, Sunset Blaze, Stealth) and Streak Shields.
• Post-Workout Summary: Track total session time, active work duration, recovery rest, and estimated calorie burn (MET 8.0).
• Workout History: Automatically saves your completed sessions with CSV export.

🎯 PERFECT FOR ALL DISCIPLINES:
- High-Intensity Interval Training (HIIT) & Tabata
- Boxing, MMA & Combat Sports Rounds
- CrossFit, Functional Fitness & Circuit Training
- Bodyweight Workouts & Calisthenics
- Kettlebell Swings & Strength Intervals
- Running, Sprint Intervals & Cardio

🔒 NO ACCOUNTS & NO DISTRACTIONS
- Offline Timer: All timer modes, voice cues and workout history work without an internet connection.
- Zero Sign-ups: Open the app and start training immediately. No accounts or logins required.
- Display Wake-Lock: Keeps your screen awake during workouts so your phone never sleeps mid-set.

Download Interval Timer today and train with pure athletic focus!

What’s new

Official Google Play Release!
• Customizable HIIT, Tabata, and circuit interval timer.
• Procedural audio chimes, voice cues, and haptic pacing.
• Workout history tracking, daily streaks, and routine presets.
• Smooth performance and battery optimizations.