Was that workout really in Zone 2?
Zone2 scores each workout against your target zones and rolls them into weekly goals that you choose.
No data is shared with third parties.
See your minutes in zone the moment you finish.
Zone2 makes it easy to track your minutes in each zone. There’s no readiness score to decode, no weird upsells, and definitely no fluff.
Decide the workout before your ego does.
Mix any activities and zones in one session — an easy 30-minute run, a hard 10 on the rower, a long Sunday ride. Build it on your iPhone, send it to your watch, and let your wrist keep you honest.
Your watch taps you the moment you leave the zone.
Your current zone stays on your wrist for the whole workout. If your heart rate climbs too high, a tap brings you back — no bad news waiting at the end.
Advice with your numbers in it.
Coach knows your zones, your goal, and what you’ve already done this week, so its answer is specific: which session, how long, what heart-rate range. You can check every number it cites against your own history — and when there’s nothing useful to say, it says nothing.
Your heart rate never leaves the Apple ecosystem.
Coach runs on Apple’s Foundation Models — on device, or on Apple’s Private Cloud Compute when a request needs more. There is no Zone2 server, no third-party AI vendor, and no analytics pipeline collecting your training.
Nothing is sent to OpenAI, Anthropic, Google, or anyone else. Apple’s models only.
Your data lives in HealthKit and iCloud, under your Apple Account. There’s nothing for us to leak.
No SDKs watching what you tap. Zone2 is a tool you own, not an audience you join.
Your zones live in one place: the Health app.
Zone2 doesn’t guess your max heart rate or invent a proprietary formula. It’s built on Apple’s new HealthKit workout-zone APIs, so the zones you see are the ones you set in Health — change them there, and every score, goal, and watch alert follows.
Know your next workout counted.
Zone2 is free. Set a weekly goal in under a minute, then go train — your minutes in zone will be waiting when you’re done.
Free. An optional subscription unlocks Coach and multi-zone weekly goals.
No — any heart-rate device that writes to HealthKit works. The watch app adds live in-workout feedback.
Health → Browse → Heart → Heart Rate Zones. Zone2 reads them directly.