IntervalGuide: HR & HIIT Timer

Your workout. Your rules. IntervalGuide is a fully customizable interval timer for HIIT, Tabata, boxing, and circuit training — built to work exactly the way you train. Design your interval workout block by block: set work and rest periods, add rounds, choose audio cues, and train in the right heart rate zone. Shake your phone to pause or resume — no need to touch the screen mid-round. Whether you're doing HIIT, boxing rounds, kettlebells, running intervals, or strength-training rest periods, IntervalGuide adapts to your routine, not the other way around. 🥊 HANDS-FREE CONTROL Shake your phone to pause or resume — no need to remove your gloves, stop your set, or fumble with your screen. Perfect for boxing, kettlebells, winter runs, or any workout where touching your phone isn't an option. ⏱️ FULLY CUSTOMIZABLE TIMERS Build workouts your way: • Create unlimited interval blocks with custom durations • Set work, rest, and preparation phases • Add rounds and repeats to any block • Assign colors to visually distinguish each phase • Save and reuse your favorite workouts ❤️ REAL-TIME HEART RATE Connect your heart rate monitor and train in the right zone: • Polar sensors supported out of the box • Generic Bluetooth Low Energy (BLE) heart rate devices • Live HR display during workouts • Customizable heart rate zones 🔊 AUDIO & HAPTIC CUES Stay focused without watching your screen: • Voice announcements for phase changes • Boxing bell and other sound effects • Vibration alerts to keep you on track • Works with headphones and speakers ⌚ WEAR OS COMPANION Control your workout from your wrist: • Start, pause, and stop from your watch • See timer and heart rate at a glance • Full data sync between phone and watch 📊 WORKOUT HISTORY Track your progress over time: • Automatic session logging • Review past workouts with full details • Heart rate data for every session 🎯 BUILT FOR REAL TRAINING No bloat, no social features, no accounts required. Just a powerful, reliable interval timer that runs in the foreground and never quits on you mid-workout. Works great for: • Boxing & MMA rounds • HIIT & Tabata • Strength training rest periods • Yoga & stretching flows • Running intervals • CrossFit-style WODs • Physical therapy exercises Download IntervalGuide and build the interval timer that fits your training — not someone else's.