# ZoneLock — Heart Rate Zone Training > Heart Rate Zone Training (iPhone/iPad app by Vishesh Bhardwaj.) - Source: https://appshunter.io/ios/app/zonelock/id6775130044 (this page in markdown: same URL + `.md`) - Developer: [Vishesh Bhardwaj](https://appshunter.io/developer/1895559654) - Category: Health & Fitness, Sports - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 15.0 · 9 MB - Languages: American English - Released: 2026-06-18 - Data updated: 2026-08-13 - User reviews in markdown: https://appshunter.io/ios/app/zonelock/id6775130044/reviews.md ## What is ZoneLock? Train smarter. Stay in your zone. ZoneLock is a heart rate zone training app built for athletes who train with intent. Connect your chest strap or Apple Watch, pick your zone, and get real-time alerts the moment you push too hard or need to work harder. Apple Watch and chest strap support, free No subscription needed to train. Use your Apple Watch as your live heart rate source, or connect a Polar H9, H10, or any Bluetooth chest strap. Start a session on your watch and leave your phone behind. Everything syncs automatically, even if your phone was closed during the workout. Real-time zone alerts Audio and haptic cues the moment you drift above or below target, with a different pattern for each, so you know which way you went without looking at your screen. Personalised heart rate zones Set up your five training zones using the Karvonen method, refined by a guided submaximal fitness test. ZoneLock calculates your exact BPM ranges and remembers them so every session starts in seconds. ZoneSignal daily readiness Before every session, ZoneSignal reads your sleep, HRV, resting heart rate, and recent training load to tell you whether to go hard or ease off. No guessing. Just a clear daily signal backed by your own data. Session history Every session is saved with your time in zone, average BPM, max BPM, and a full breakdown of time spent below, in, and above your target zone. Built for serious training Zone 1 through Zone 5. Dark mode. Share your session summary. Designed to be readable at arm's length mid-workout. ZoneLock is free to download and free to train with. Pro unlocks full session history, session stats and trends, and ZoneSignal readiness scoring. 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/ ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | ZoneLock Pro Monthly | $2.99 | per month | | ZoneLock Pro Yearly | $19.99 | per year | ## Version history (last 5 releases) ### 1.3.6 — 2026-08-11 Chest strap sessions no longer stop recording when your screen locks. Put your phone in your pocket and your workout keeps tracking, with zone alerts still firing. Apple Watch no longer requires a subscription. Train with your Watch for free. Also in this update: - Zone audio cues now briefly lower your music instead of competing with it - Zone cues now recover correctly after a phone call interrupts them - Workouts finished without a connection are now saved and sync once you're back online - Your history and zone setup now work offline - Rest days and readiness feedback are kept if you log them offline - Fixed Apple Watch sessions recording heart rate with the wrong timestamps, which could make time in zone inaccurate - Fixed a session occasionally being saved to history twice - New users now get a suggested zone from their calibration instead of one based on a single earlier session - Fixed Pro sometimes showing as inactive on Apple Watch - Fixed a rare error while scanning for a chest strap ### 1.3.2 — 2026-07-31 - Fixed the Apple Watch timer freezing while the screen was off and resuming from where it stopped - Session duration on the watch summary now matches your actual workout - Ending a session no longer loses your workout if the strap disconnected or went out of range - Fixed a session being saved twice on a quick double tap - History now shows all your sessions, not just the last 20 - ZoneSignal refreshes when you return after changing Health permissions - Distinct haptics for above-zone and below-zone alerts - The return key now signs you in ### 1.3.1 (2) — 2026-07-22 ZoneLock 1.3.1 is a major update. ZoneSignal daily readiness Before every session, ZoneSignal reads your sleep, HRV, resting heart rate, and recent training load to recommend whether to push hard or ease off. Full-screen readiness page with plain-language explanations for each signal. Heart rate zone calibration Set up personalised training zones using the Karvonen method, refined by a submaximal fitness test. Includes health screening and safety disclaimer. Retest reminders as your fitness changes. Dark mode redesign Every screen has been rebuilt with a consistent dark aesthetic built for training environments. Android support ZoneLock is now available on Android with Health Connect integration for readiness scoring and heart rate zones. Share your sessions Share a session summary card with your training stats directly from session history. Reliability fixes Fixed a duplicate Apple Watch session bug. Watch sessions now persist natively and survive an app relaunch. Fixed Pro status flicker on launch. Fixed profile-load errors that could show a blank screen instead of redirecting to sign-in. Legal and safety Added medical disclaimer, terms, privacy policy, eligibility pages, 13+ age gate, and safety disclaimer before the fitness test. ### 1.3 — 2026-07-05 ZoneLock just got a major upgrade. Heart Rate Zones. Set up your personal heart rate profile using your age or a guided calibration test. ZoneLock calculates your five training zones and lets you pick a zone before each session instead of setting BPM ranges manually. Dark Mode. The app is now fully redesigned with a dark interface built for training environments. Apple Watch Reliability. Session data from your Apple Watch now saves reliably even if the app was closed during your workout. Safety and Legal. New safety disclosures, age requirements, and legal pages have been added in compliance with App Store guidelines. ### 1.2 — 2026-06-20 Improvements, and bug fixes. ## Apps similar to ZoneLock | App | Rating | Price | Category | | --- | --- | --- | --- | | [EverMe](https://appshunter.io/ios/app/everme/id6737840911) | 4.6 (12) | Free | Health & Fitness | | [MySaskHealthRecord](https://appshunter.io/ios/app/mysaskhealthrecord/id6444068088) | 2.5 (2) | Free | Health & Fitness | | [Interval Timer HIIT Workout](https://appshunter.io/ios/app/interval-timer-hiit-workout/id6741055716) | 4.8 (300) | Free | Health & Fitness | | [AI Calories: Scanner & Counter](https://appshunter.io/ios/app/ai-calories-scanner-and-counter/id6743567298) | 4.9 (61) | Free | Health & Fitness | | [Charm: Skincare Routine 360°](https://appshunter.io/ios/app/charm-skincare-routine-360/id1480983279) | 4.5 (1,501) | Free | Health & Fitness | | [Gym log - Strive](https://appshunter.io/ios/app/gym-log-strive/id6449553638) | 4.9 (796) | Free | Health & Fitness | ## More apps by Vishesh Bhardwaj - [Smash - Badminton Training](https://appshunter.io/ios/app/smash-badminton-training/id6763928060) All apps by Vishesh Bhardwaj: https://appshunter.io/developer/1895559654 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-13.*