Zone alerts are now free for your first 14 days. RuckZone is built around keeping you in the right heart-rate zone — you shouldn't have to pay before finding out whether that works for you. Your full ruck history is now free. Every ruck you record stays visible, with its Load Score. We also stopped asking for a subscription during setup. Get to your first ruck, then decide.

This update fixes a number of bugs and improves overall stability and reliability across iPhone and Apple Watch.

Terrain now affects your calorie estimate. Pick the surface you rucked on (pavement, gravel or dirt road, grass, sand, slippery ground, or swamp) and RuckZone adjusts the energy cost to match. Soft ground costs meaningfully more than pavement, and sand gets more expensive the slower you walk. Terrain applies where energy is estimated: iPhone rucks and manually logged rucks. Apple Watch rucks keep using the energy Health measured from your heart rate, so they are unaffected. Also in this release: • Fixed two errors in the LCDA calorie model. On a 10% grade the climb term was running about 6% high, and loaded rucks were coming out about 1% low. • RuckZone now runs on iOS 18 and watchOS 11, so it works on more iPhones and Apple Watches.

- Live Activity and Dynamic Island: your ruck now stays on the Lock Screen and in the Dynamic Island — elapsed time, distance, pace, load and Load Score at a glance, and you can pause or finish without opening the app. - More accurate calories: energy burned is now estimated with a load-carriage model that accounts for pack weight, walking speed and grade, rather than a generic walking estimate. Workouts you have already saved keep their original numbers. - Reliability: an interrupted ruck resumes cleanly, and paused time never counts toward your total.

- New: track rucks live on your iPhone with GPS — distance, pace, elevation, a route map and Load Score, all from a quick Start button. - Outdoor Apple Watch rucks now record your GPS route and recover cleanly if the workout is interrupted. - Faster, redesigned Stats with correctly aligned weekly and monthly charts. - Reliability fixes across workout recovery, Apple Health syncing, elevation tracking and subscriptions.