For iPhone · iOS 26 and later
Detect a grab.
Sound an alarm.
Shake Blocker watches for sudden grabs and Bluetooth leash disconnects. While the app is on screen, your verified Lock Screen shortcut can lock your iPhone. Background triggers can sound an optional alarm and send a notification.
Three days free. One lifetime purchase.
Start the free 3-day Trial to try all protection features for 72 hours. Afterward, a one-time lifetime purchase is required to start protection again. The base price is US$3.99; regional prices appear in the app. No subscriptions or automatic trial-end charge.
Owner controls
Use Face ID or your device passcode to dismiss a triggered alarm. Unlocking and alarm dismissal remain available after the trial. History, event locations and optional intruder photos stay on your iPhone.
Know the limits
Bluetooth distance is approximate. Background protection is opt-in, uses location updates with a visible iOS indicator, and depends on permissions and iOS lifecycle behavior. The app cannot lock the screen in the background, restrict other apps or guarantee theft prevention.