LockIN
Support
LockIN is a Zone 2–first running coach for iPhone and Apple Watch. Questions about zones, your data, or a purchase? We read every message.
Contact support
Include your iPhone and Apple Watch models plus OS versions if you can.
Report a problem
Tell us what happened — before a run, mid-run, or reviewing one after.
Quick answers
Do I need an Apple Watch?
Live heart-rate coaching is built around Apple Watch — the watch app coaches on your wrist and mirrors live to your iPhone.
How are my zones set?
LockIN calibrates a personal easy-effort band with three calibration methods, and you can always override it manually in Settings.
What health data does LockIN use?
With your permission it reads heart rate and workout history from Apple Health to coach and calibrate, and saves each run back as a workout. Everything stays in Apple Health and on your device — LockIN has no servers. See the privacy policy.
Is location required?
No — GPS routes and pace are optional. Heart-rate coaching works fully without location access.
How do I restore LockIN Premium?
Open the Premium paywall from Settings, then tap Restore Purchases. Use the same Apple Account that made the purchase.