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Make sure your phone is not in silent mode, Do Not Disturb is off, and the system volume is set to maximum. Water Eject uses a low sub-bass tone — at low volume you may feel it more than hear it.

Go to iOS Settings ▸ PureWave ▸ Microphone and enable access. The analyzer processes audio entirely on-device — nothing is recorded or sent anywhere.

On the paywall screen, tap Restore. Your purchase will be re-fetched from Apple. Make sure you're signed in to the same Apple ID you used for the purchase.

Open iOS Settings ▸ tap your Apple ID at the top ▸ Subscriptions ▸ PureWave, then tap "Cancel Subscription". You can also reach this from inside PureWave: Settings ▸ Manage Subscription.

The Hearing Range Test sweeps from 20 Hz up to 20 kHz and reports the highest frequency you can still hear. It is informational and educational, not a medical diagnostic. For a clinical hearing test, see a licensed audiologist.

Yes. The only network call PureWave makes is to verify your subscription on launch via RevenueCat. Every audio tool runs fully offline.

PureWave keeps the screen awake during Burn-in to avoid audio session interruption. If your phone still sleeps, plug it into power and check that "Auto-Lock" is set to a generous value in iOS Settings ▸ Display & Brightness.

Test history is stored locally on your device. If you reinstalled the app or restored from a backup, the history may not have transferred. We're working on iCloud sync for a future update.

PureWave doesn't store any data off-device. Delete the app from your home screen and iOS will purge the local container. Subscription status is held by Apple and RevenueCat under their respective policies.

iPhone and iPad running iOS / iPadOS 17 or later. The widget and Shortcuts work on iOS 17+; the Spectrum Analyzer requires a working microphone (it will not function in the iOS Simulator).