HIIT Timer Pro Support

Check that your iPhone or iPad isn’t set to silent mode and that the sound pack volume in the app is turned up.

Make sure background app refresh is allowed for “HIIT Timer Pro” in Settings, since disabling it can interrupt background playback.

Open “HIIT Timer Pro”, go to the upgrade screen and use the “restore purchases” option to bring back unlimited workouts, full history and cloud sync.

Once your 20 free sessions are used, a subscription is required to continue with unlimited workouts, full history, cloud sync and an ad-free experience.

Cloud sync is part of the upgraded plan, so confirm your subscription is active and that you’re signed in with the same Apple account on both devices.

The latest version is 1.3, released on June 14, 2026. To update, open the App Store, tap your profile picture, pull down to refresh, then tap Update next to HIIT Timer Pro. You can also turn on automatic updates in Settings › App Store.

Subscriptions are managed by Apple. Open Settings, tap your name, then Subscriptions, and choose HIIT Timer Pro to change or cancel your plan. Cancel at least 24 hours before renewal to avoid the next charge; deleting the app does not cancel it. Refund requests go through reportaproblem.apple.com and are decided by Apple.

In HIIT Timer Pro, use the option to delete your data in the app’s settings, where available. Deleting the app also removes the data stored on that device.

Please do. Use the form below or write to contact@develak.com. Updates to our apps are often shaped by messages from the people who use them.