Interval Rush vs 1SecondLap

Unlock your fastest running potential with a training app built for progress, precision, and performance. This app combines custom interval programming and detailed performance analytics to help you train with purpose and run stronger, whether you're preparing for your first 5K or chasing a new personal best. Train With Control Build fully customized interval workouts Set time, distance, pace targets, rest, and repeats Choose from proven workout templates for speed, endurance, thresholds, and recovery Personalized Running Guidance Create a training plan based on your goal Workouts matched to your level, pace, and target distance Train with structure and consistency Run Anywhere. Track Everything. Open run mode for free running Live pace, distance, cadence, and heart-rate tracking Audio and haptic guidance to keep you on target Apple Watch Native Start and complete runs from your wrist Train without your phone Sync sessions for detailed review on your phone Analyze. Learn. Improve. Interval breakdowns and detailed pacing Heart-rate zones and training load Splits and performance trends over time Built for Every Runner Whether you are a beginner building endurance, a competitive runner chasing speed, or someone who wants smarter training structure, this app gives you the tools to reach the next level. Train with intention. Run with confidence. Improve with every session.

One app for your whole workout — and your data never leaves your phone. 1SecondLap combines a GPS run tracker, interval workout timer, Bluetooth gym-machine console and reflex trainer in one free app. No account, no ads, no subscription. RUN OUTDOORS • Distance, pace and route with automatic per-km splits announced out loud • Ghost runs: race your best previous run on the same route and hear how far ahead or behind you are • Spoken pace coach — pick a target pace and get "speed up / slow down" cues • Distance goals with voice announcements, route maps and GPX export • Keeps tracking with the screen locked; Live Activity on the lock screen INTERVAL WORKOUTS • Reps, work and rest with voice countdowns — Tabata, HIIT, EMOM, boxing templates plus your own presets • ERG mode: with a compatible smart trainer, the app sets the trainer's resistance for every work and rest interval automatically GYM MACHINES • Connect Bluetooth bikes, treadmills, rowers and cross-trainers (FTMS/CSC) • Live cadence, power, speed, stroke rate and heart rate from a strap • Heart-rate zones with spoken zone cues and per-session time-in-zone PROGRESS • Activity heatmap, weekly volume and training load from your heart-rate data • Pace, power and reaction-time trends with personal records and streaks • Brain + body: see how your reaction time changes right after exercise • Workouts save to Apple Health APPLE WATCH • Stopwatch, timer and interval workouts on your wrist PRIVACY • Everything is stored on your device. No sign-up, no tracking, no analytics.