A little help.
Back to your day.

The native app reads the previous version's workout database on first launch when it is present in the same app installation. It leaves the original database untouched. Back up your iPhone before upgrading. Uninstalling the old app first removes its local data, so don't uninstall to upgrade.

In You & MyLifts, choose Export backup and share the JSON file to a safe location. On your other device, choose Import backup or workout CSV. The new app can also import Strong and Hevy CSV exports and preserves unmatched exercises as custom exercises. Review the preview before importing.

Workouts continue saving on your iPhone. Check your connection, then open You & MyLifts and select Sync now. If your session has expired, sign in again. Sign in with Apple again if your session has expired.

Yes. Workout logging, routines, your exercise library, history, and progress charts work locally. Cloud sync runs when you're signed in and connected.

Enable Save workouts to Apple Health in the app's preferences, then allow access in Apple's permission dialog. Completed workouts are queued for writing while this setting is enabled. You can separately choose to backfill imported history. Do not backfill workouts already saved by another app. Permission can be managed in Health.

Open You & MyLifts and choose Delete cloud account. Confirm to delete the cloud library and revoke sign-in. Your local workouts remain on your iPhone, and exported backup files remain wherever you saved them.

Pro renews weekly at the price shown by the App Store. Restore purchases while signed in to the MyLifts account used for the original purchase. Manage or cancel Pro in your App Store subscription settings. Deleting your MyLifts account does not cancel your Apple subscription.