Just holler.
One shake, and the people you trust know you need them and exactly where you are.
SIREN
Hold to stop · PIN required
Opening early access in
- London
- New York
- Manchester
- Chicago
- Paris
How it works
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.
Why Holler
A deterrent first. Reliable always. Private by default.
A safety app should not be the thing watching you. We make concrete promises, not vague ones.
How Holler handles your dataIt deters, it doesn't just report
A loud siren and bright strobe are built to stop a threat before it starts, not narrate it afterwards.
It fires every single time
No login on the critical path. A shake fires it without unlocking or even looking at the screen. The alarm, strobe and recording work even with no signal, and a Test button proves your setup before you need it.
It isn't watching you
Your location is shared only during an active alert, with the one person you chose. Never sold. EU data residency.
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.
Does my contact need an iPhone?
No. Your trusted contact gets your alert and live location whether they are on iPhone or Android.
Is Holler tracking me all the time?
No. Holler shares your location only while an alert is active, and only with the contact you chose. It is not an always-on tracker.
Be among the first to walk home with Holler.
Join the early-access list. We will email you the moment it is ready in your city. No spam, ever.