How it works
How Holler works
Shake your phone and it becomes a deterrent, a record and a way to bring someone you trust with you, all at once. Here is exactly what happens, and every way you can set it off.
One shake. Three things at once.
- 01
Shake it
Arm Holler for your walk home, then a shake sets it off, even with your phone locked in your pocket. Prefer a button? The on-screen button, Lock Screen widget and Action Button all fire it too.
- 02
It screams, flashes, records
A max-volume siren and full-screen strobe go off, even on silent, and it starts recording the scene.
- 03
Your person is alerted
One contact you chose gets your live location, even on Android. And a Call 112 / 999 / 911 button is one tap away.
Ways to trigger it
A shake is the signature move: arm Holler for your walk home and a firm shake fires it even with the phone locked in your pocket. Prefer to reach for it another way? Every trigger below fires the exact same alarm.
Shake
The signature move. Arm a walk-home session and a firm shake fires Holler even with your phone locked in your pocket. No unlocking, no hunting for a button.
On-screen button
A big, unmissable button when the app is open. No menus, no hunting.
Lock Screen widget
Trigger straight from the Lock Screen without unlocking your phone.
Action Button
On iPhone 15 Pro and later, set the Action Button to fire Holler instantly.
A response that matches the moment
Not every situation is an emergency. Holler gives you a ladder, so you can pick the level the moment calls for.
Fake call
A realistic incoming-call screen gives you a low-stakes reason to step away from a situation, with no alarm at all.
Siren
A max-volume siren and full-screen strobe, even on silent, to deter a threat, and recording starts as evidence.
Full alert
Everything in the siren, plus your trusted contact gets your live location and a one-tap way to help. A button to call your local emergency number is always there.
Honest answers
Does Holler call the police for me?
No, and no app can. Phones do not let any app silently dial the emergency services. Holler alerts a trusted contact you choose and gives you a one-tap button to call your local emergency number yourself (112 in Europe, 999 in the UK, 911 in the US). Holler is not a substitute for emergency services.
How do I set off the alarm?
Just shake your phone. Arm Holler for your walk home and a firm shake fires the alarm and sends your live location to your trusted contact, even with the phone locked in your pocket. You can also tap the on-screen button, use the Lock Screen widget, or set the Action Button on iPhone 15 Pro and later.
Will it go off by accident in my pocket or bag?
Holler only listens for a shake while you have armed a walk-home session, and it takes a firm, deliberate shake to fire, not the everyday jostle of a bag or pocket. When you are not in a session, nothing is listening.
Does the alarm work on silent?
Yes. The siren plays over the mute switch and the strobe lights the screen, so the deterrent works even with your phone silenced.
Be among the first to walk home with Holler.
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