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★★★★★
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Performance and stability improvements.
STOP CHECKING YOUR WRIST WHILE YOU TRAIN. ZoneLock keeps you in your target heart-rate zone with real-time voice, audio, and haptic cues. Pick a zone, start your session, and know the moment you need to push harder, ease off, or when you're back in range. TRAIN WITH APPLE WATCH OR A CHEST STRAP Use your Apple Watch as your live heart-rate source or connect a compatible Bluetooth heart-rate chest strap. Start a session and let ZoneLock monitor your effort while you focus on the workout. REAL-TIME ZONE GUIDANCE Choose Zone 1 through Zone 5. ZoneLock alerts you when you move above or below your target so you can adjust without constantly looking at a screen. PERSONALIZED HEART-RATE ZONES Set up your five training zones using your profile and ZoneLock's guided calibration flow. Your BPM ranges are saved so you can start future sessions quickly. SESSION SUMMARIES Review time in zone, average BPM, max BPM, and how much of each workout was below, in, or above your target - right after every session. BUILT TO KEEP TRAINING SIMPLE - Apple Watch support - Bluetooth chest-strap support - Voice, audio, and haptic zone cues - Zone 1 through Zone 5 - Personalized BPM ranges - Session summaries and sharing - Dark interface designed for training environments ZoneLock is free to download and free to train with. ZoneLock Pro unlocks your full session history, ZoneSignal - a daily readiness signal built from sleep, HRV, resting heart rate, and recent training load - and 4 additional voice-cue characters. ZoneLock Pro - auto-renewable subscription - Monthly: $2.99 per month - Annual: $19.99 per year Each plan begins with a 7-day free trial. Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Manage or cancel anytime in your iPhone Settings. Privacy Policy: https://zonelock.app/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/