ZoneLock

Your heart rate. Your zones. Your pace. ZoneLock keeps you in the zone with live alerts, Apple Watch support, and zones calibrated to your physiology.

Train smarter. Stay in your zone.

ZoneLock monitors your heart rate in real time and keeps you locked into your target training zone throughout your workout. Set your zone, connect your heart rate monitor, and let ZoneLock guide your effort with instant alerts when you push too hard or need to work harder.

How it works:

Before your session, set a target heart rate zone based on your age or your own numbers. During your workout, ZoneLock reads your live heart rate and alerts you the moment you leave your zone with an audio cue and haptic feedback. After your session, review your stats including average BPM, max BPM, time in zone, and time spent above and below your target. Works with your gear

ZoneLock connects to any Bluetooth LE chest strap including Polar H9, Polar H10, and other standard heart rate monitors. For the most accurate readings during high-intensity training, a chest strap is recommended over optical wrist sensors.

Apple Watch support:

The ZoneLock Apple Watch app runs completely standalone during your workout. Leave your phone on the sideline. Your watch tracks your heart rate, fires haptic zone alerts on your wrist, and syncs your completed session back to your iPhone automatically when you are back in range.

Built for every athlete:

Whether you run, cycle, swim, lift, play court sports, or train in any other way, ZoneLock works for any activity where heart rate zone training matters. No sport-specific features. No unnecessary complexity. Just your zone, your heart rate, and an alert when you drift.

Session history:

Every session is saved to your account. Review your past workouts, track your stats over time, and see how consistently you are hitting your target zone across sessions.

ZoneLock Pro:

Unlock the full ZoneLock experience with a Pro subscription.

Full session history with saved workouts Multiple saved zone presets for different training types.

Apple Watch standalone support

$2.99 per month or $19.99 per year. Cancel anytime in iPhone Settings > Apple ID > Subscriptions.

Privacy first:

Your heart rate data belongs to you. ZoneLock never sells or shares your data. All session data is stored securely in your account and is only accessible to you. Delete your account and all data at any time from within the app. Terms of Service: https://zonelock.app/terms

Privacy Policy: https://zonelock.app/privacy