Just holler.
Walk home like someone's got your back. One move turns your phone into a loud, flashing alarm.
SIREN
Hold to stop · PIN required
Opening early access in
- London
- New York
- Manchester
- Chicago
- Paris
How it works
One move. Three things at once.
- 01
Trigger it
Shake it, press the button, use the Lock Screen widget or the Action Button. However you reach for it, it fires.
- 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. The alarm, strobe and recording work even with no signal. 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.
The alarm is always free.
Free to download, and the deterrent, recording and trusted-contact alert are free forever. Holler Pro (planned, from EUR 3.99 a month) adds unlimited contacts, live location streaming and a family plan. You never need it to raise the alarm.
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.
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.
Is the alarm really free?
Yes, forever. The siren, strobe, recording and trusted-contact alert are free. An optional Pro plan adds things like unlimited contacts, but you never need it to raise the alarm.
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.