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Yes. The body map, the exercise library and the workout logger are free. Pro is an optional upgrade with deeper tools like the workout generator, all programs and the recovery map. There are no ads on any plan.

Yes. Pick kg or lb in Profile, then Units & language, and the whole app follows.

Android and iPhone. Android comes first, on Google Play; the iPhone app follows on the App Store. Join the waitlist at blackbone.tech/download to hear the day it's out.

Yes. Logging, rest timers, your history, PRs and saved workouts all work offline. Workouts save on your phone first and sync to your account when you are back online. Exercise videos need a connection.

Subscriptions are handled by Google Play (or the App Store on iPhone). Cancel there: in Google Play, open your profile, then Payments & subscriptions, then Subscriptions. Deleting your BLACKBONE account does not cancel a subscription.

Open Profile, then Subscription, and tap Restore purchases while signed in to the same store account you paid with. If Pro still doesn't show, send us a message below with the email on your store account.

In the app, open Profile, then Privacy, then Download my data. We email you a link to a file with your records and progress photos. The link works for 7 days.

In the app: Profile, then Account & Security, then Delete account. Without the app, ask on the account deletion page at blackbone.tech/delete-account.

Only you. Our team can't see your set logs, body measurements or progress photos, and we never sell your data. A coach only sees what you choose to share with them.

Open Profile, then Become a coach, and upload your certification. Once our team approves it, you can choose a coach plan and invite clients.