RunnersHeart vs HyroxSim

RunnersHeart transforms your Apple Watch into a smart running coach that keeps you in the right heart rate zone. REAL-TIME ZONE FEEDBACK • Feel haptic vibrations when you enter a new heart rate zone • Each zone has a unique vibration pattern - instantly know your intensity • Stay in your target zone without constantly checking your watch PERSONALIZED HEART RATE ZONES • Choose between %MaxHR (simple) or Heart Rate Reserve (advanced) methods • Auto-estimate your resting heart rate from HealthKit data • Zones automatically calculated based on your age and fitness level DETAILED WORKOUT ANALYSIS • View time spent in each zone with beautiful charts • Track your training load with Edwards TRIMP score • See your GPS route with smoothed path visualization • Share workout cards as beautiful images DESIGNED FOR RUNNERS • Minimal interface - focus on your run, not your screen • Works offline - no internet required during workouts • All data stays on your device - complete privacy • Syncs seamlessly between iPhone and Apple Watch HEART RATE ZONES EXPLAINED Zone 1 (Warmup): Easy effort, recovery Zone 2 (Endurance): Comfortable, fat-burning pace Zone 3 (Tempo): Moderate effort, improves efficiency Zone 4 (Threshold): Hard effort, builds speed Zone 5 (Sprint): Maximum effort, peak performance Whether you're training for a marathon or just getting started, RunnersHeart helps you run at the right intensity for your goals. Privacy: Your health data never leaves your device. We don't have servers - everything stays between you and Apple HealthKit.

HYROX SIM is a HYROX race simulation and rehearsal app built for iPhone and Apple Watch. Plan full HYROX-style sessions, edit runs, Rox Zones, and stations, and start the workout from your wrist. During training, follow live pace, heart rate, and segment progress in a clear interface designed for high-intensity race simulation. After the finish, review total time, splits, and recent workout history to understand how your pacing changed across the full HYROX rehearsal. Features - HYROX-focused workout builder for full race simulations - Official division presets and custom session planning - iPhone planning with Apple Watch workout flow - Live pace, heart rate, and segment progress during training - Post-workout summary with split-by-split review - Recent HYROX rehearsal history for quick comparisons Whether you are preparing for your first HYROX event or refining race strategy, HYROX SIM keeps your simulations structured, repeatable, and easy to review.