iPhone Screenshots


One Scream is a voice-activated personal safety app for women and teenage girls.

One Scream is designed for moments of extreme distress, where your instinctive reaction is to scream.

Your instinctive panic scream is what triggers the app to identify your location and send help to your loved ones.

Simply keep your phone nearby, with the app on, and One Scream will do the rest. It even works from the bottom of your handbag.

-- One Scream does not listen to your conversations, it recognises only one distinct sound --

The app picks up panic screams from girls aged 14+ and women under 60

Providing your phone has a signal, this wakes up the app to sound an alarm

A panic scream is a woman’s innate response to danger. It’s louder and more complex than other sounds and linked directly to fear. The noise from a regular conversation may measure just a few Hz on a sound scale but a panic scream can push the number way above 100 Hz.

One Scream is programmed to detect a call for survival, not just loud noises and playful screaming but urgent, guttural screams that signify genuine distress.

Select, notify & add up to 3 people to be notified if you panic scream, your helpers when you need them most.
Allow One Scream to use your microphone so the app can hear you scream
Allow access to your location so the app can send it to your helpers
Allow push notifications so you can cancel an alarm if you need to
Press the Play button to turn on One Scream and Pause to turn it off

When One Scream is on and detects a panic scream it activates an alarm on your phone.
You hear a loud siren, the phone vibrates and lights flash. A notification pops up to give you 20 seconds to press it and cancel the alarm if you need to.

After 20 seconds, both an automated voice call and a text message is sent to your Helpers to deliver the One Scream alert, which includes your name and location.

Providing your Helpers pick up the phone, the line stays open after the One Scream alert is delivered so they can hear you and gather more information for the police.

We’re not just an app, One Scream is building a community for women and girls, including anyone who wants to help protect them, like Dads, partners, teachers or colleagues.
Let us know what works and what doesn’t: Chat in the app (click the speech bubble) or email help@onescream.com

Enjoy free use of the app for as long as we’re in beta

Visit www.onescream.com

One Scream can’t hear you when you’re on a call, if your phone is off.

We are testing its’ capabilities if you are in a loud environment like at a concert or on a rollercoaster.

The app won’t work if you have no phone signal or are using another app that uses the microphone. It also can’t detect a scream if your voice is changed by the effects of alcohol or drugs.

One Scream does not record conversations or calls to Helpers.

The app can only detect panic screams and does not track your location in real-time.

We respect your privacy and exist only to empower women and teenage girls.

(One day we’d love to offer One Scream to everyone, but young girls, seniors and males sound different when they scream. We’d have to build a separate app for that.)

What’s New

Version 5.18

Brand New Onboarding UX

Ratings and Reviews

4.9 out of 5
14 Ratings

14 Ratings

PeaceIJ ,

Best app

I always use one scream on my way back, especially late at night. I feel safer and more confident knowing there’s an app that can automatically activate and alert close ones when I’m in trouble.

Ponchopup ,

So comforting!

I love knowing that I have One Scream on my phone when I feel unsafe in a situation. I always turn it on when I’m walking home, just knowing I have it on is comforting. Great app, and very easy to use!

jeslee712 ,

So glad this app exisits

It’s the app I never hope to use, but I am so glad it’s here. It gives me peace of mind if I’m ever walking home at night and feeling uncomfortable - something that happens a lot in London.


One Scream Ltd
85.4 MB

Requires iOS 10.2 or later. Compatible with iPhone, iPad and iPod touch.



Age Rating
Rated 4+
This app may use your location even when it isn't open, which can decrease battery life.
© One Scream Ltd.


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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