Meso Privacy Policy

Effective 4 October 2026. Meso is built local-first: your training data belongs on your phone, not on our servers. We do not run servers, and we do not have accounts.

What Meso stores, and where

Everything you enter in Meso (workouts, sets, check-ins, notes, settings, the name you choose to show friends) is stored on your device. If you are signed in to iCloud, Meso also keeps a private copy of your training in your own iCloud account, using Apple's iCloud key-value storage, so it comes back if you reinstall the app or set up a new iPhone with the same Apple ID. Apple stores that copy under Apple's terms; it never passes through us, and we cannot see it. Apple limits this storage to about 1 MB; once a long history outgrows it, the copy keeps your most recent blocks, and the backup file you save from Settings keeps everything. Signing out of iCloud stops the iCloud copy, and Delete everything in Settings removes it; another iPhone on the same Apple ID that still has Meso data will back up its own copy again. You can also export a backup file at any time from the Settings tab and choose where to keep it (Files, iCloud Drive, AirDrop or email); where that file goes is up to you, and we never see it. You can delete all data from the Settings tab at any time.

Rest alerts and challenge reminders are notifications scheduled on your phone. Nothing is sent anywhere to deliver them.

Training with a friend

When you choose to share a workout with a friend, or to join theirs, the two phones connect directly to each other over Wi-Fi or Bluetooth while you are near each other. Nothing goes through us or any server, and iOS asks your permission for Local Network access the first time. A friend's phone only receives a workout after they tap to join it.

What is shared: the name you choose to show friends; from the person sharing, the workout itself (the day and program names, and each exercise with its sets, rep range and target weight, in their units); and, from both of you during the session, each set you log (weight, reps, done) and whether you are resting. The workout a friend joins becomes their own session, logged with their own sets, and their phone keeps your name with it. Your sets show on their screen during the session but are not saved into their training history. Nothing else from your history is shared. Either of you can leave the session at any time.

Apple Health

If you turn on Save workouts to Apple Health, Meso writes each finished workout to the Health app on your iPhone as strength training, with its start and end time. Meso does not write your sets, exercises, or any estimate of calories, and it does not read anything from Apple Health. The workouts stay in your Health app, under your control; turning the setting off stops new ones, and deleting Meso's data does not remove ones already saved. Meso never sends Health data anywhere and never uses it for advertising.

What else leaves your device

Purchases. When you buy Meso Pro, Apple processes the payment; we never see your payment details. To validate purchases, the app talks to RevenueCat, which processes a random app-generated identifier and your purchase receipt. This identifier is not linked to your name, email, or training data. RevenueCat's privacy policy is at revenuecat.com/privacy.

Links you open. Technique videos and research papers open in your browser as a search for that exercise or paper; that site sees the search, as with any page you visit.

What we never collect

No accounts, no email addresses, no analytics on your training, no advertising identifiers, no selling of data. Your workout data is never transmitted to us. It only reaches another person when you share a workout with a friend.

Health disclaimer

Meso provides training guidance, not medical advice. Consult a health professional before starting a training program.

Changes and contact

If this policy changes, the update will be posted at this address with a new effective date. Questions: support@mesohypertrophy.com.