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Support & Contact

Help with OneRM, purchases, notifications, and Apple Watch.

Calculate an estimated 1RM

Enter the weight, repetitions in one set, and RPE. RPE 10 means no repetitions left in reserve; 9 means about one left; 8 means about two; 7 means about three. The estimate appears at the top. Open the conversion table for 2–12 repetitions.

Lock a 1RM and work backwards (Pro)

Tap the 1RM number to open the input panel. Set your reference 1RM and lock it. The two most recently entered values among weight, repetitions, and RPE become the inputs; the remaining value is calculated. Unlock in the same panel to return to normal calculation.

Estimates do not guarantee that you can lift a weight. Use a separate estimate for each exercise and adjust based on your form and condition.

Purchases and restoration

Pro includes the locked-1RM solver, formula selection, and additional sounds. Available purchase options and prices will be shown in the App Store and in the purchase screen. To restore, sign in with the Apple Account used for purchase, open the Pro screen from Settings, and select Restore Purchases. Internet access is required.

If you purchased a monthly subscription, manage it in iPhone Settings → your name → Subscriptions. Deleting the app does not cancel a subscription.

Apple: cancel a subscription · Apple: request a refund

Timer sounds and notifications

Choose 1:00, 2:00, 3:00, or 5:00. Tap the timer circle to start, pause, or resume. Adjust with ±0:30 and ±1:00. iPhone sounds respect Silent Mode. Check volume, notification permissions, and Focus settings if alerts do not arrive. Notification and haptic behavior depends on the OS, device, and settings.

Apple Watch

Install OneRM from the iPhone Watch app. The Watch app includes a calculator and rest timer. Select the weight and use the Digital Crown to adjust it; choose RPE from 7 to 10 in 0.5 steps. Haptics follow Watch settings. The 3–2–1 haptics are not guaranteed while the app is in the background. Open both apps and check pairing if unit or formula settings have not synced.

Data and help requests

Inputs and settings stay on your devices. Reset settings to return to defaults. Delete the app on both iPhone and Watch to remove their local app data. Manage OS backups in Apple's settings. Read the privacy policy.

When the support address becomes available, include your device, OS and app versions, steps to reproduce, and the error text. Remove personal information from screenshots. Do not send passwords, card numbers, or banking information.