The OnSiren app
The App for the Frontline.
Alpha One briefs you before you start. Alerts go to the officers around you the moment you send them. Push-to-talk works like a radio, in your own language.
Briefs, alerts and push-to-talk for security officers. Free for SIA licence holders.
Free for SIA licence holders · iPhone and Android
Officers Work Alone. Threats Don’t.
Most security officers work alone: one door, one shop floor, one site radio that reaches the building and nothing beyond it. When something happens on the next street, they’re often the last to hear.
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No shared picture.
You start a shift knowing what your site told you. What happened nearby last night rarely reaches you.
With OnSirenAlpha One briefs you on your ground at sign-on.
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A radio that stops at the fence.
Site radios reach one building and one company. The officer next door, working for someone else, can’t hear you.
With OnSirenOne channel for the officers working your area, whoever they work for.
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On your own when it matters.
When something starts, the officers who could help are often a street away and don’t know.
With OnSirenRaise an alert and it reaches the officers around you, wherever you are.
Public-safety infrastructure, built by the private sector, at zero public cost.
Meet Alpha One
Briefed Before You Start.
Alpha One, the AI in the system, briefs you at sign-on with what matters on your ground.
- Incidents and lookouts near you
- Weather, crowds and the threat level
- Ask by voice or in writing
Not an emergency service. In an emergency, call 999.
- Daily briefYour local picture, wherever you are.
- What to watch forLookouts from OnSiren command.
- Ask Alpha OneBy voice or in writing, even when you work alone.
- Nearest helpThe closest A&E or police station.
Seen Something? Raise It Once.
Say what you see in your own language. The alert reaches the officers around you.
- Pick what’s happening in one tap
- Voice notes translated into English
- See who has acknowledged it
Alerts go to other officers. In an emergency, call 999.
- One tapPick what’s happening and send.
- Your languageVoice notes written out and translated.
- Add a photoShow the officers what you saw.
- AcknowledgedSee which officers have acknowledged it.
One Press. Everyone Hears.
Hold the button and speak, and you’re heard like a radio. Every transmission is captioned.
- Translated if it isn’t in English
- Talk from the lock screen
- Every transmission kept in chat
- Live captionsEvery transmission written as it’s spoken.
- Any languageAnything not in English is translated.
- Channel chatEvery transmission kept, with messages.
- Lock screenTalk without opening the app.
Radio Check. Do You Copy?
Alpha One calls you for a radio check. Hold the button and say copy.
- Your first answer each day lights a dot
- 37 dots fill a shield and raise your rank
- Spots a muted mic or low volume
- Say copyHold the button and answer Alpha One.
- Your shieldOne dot for your first answer each day.
- Ready to talkYour mic, volume and connection, checked.
- Your rankShields take you from Steel to Platinum.
Your Channel. Your Ground.
Your channel on the map, with the UK threat level and your area’s crime picture.
- Your local police team and their priorities
- What’s on and the nearest services
- Trains, buses and helplines
- MI5 threat levelThe national picture, on your map.
- Crime rateYour area against England and Wales.
- Numbers to ringTap a number to call it.
- DirectionsA walking route in your own maps app.
Known by Your Call Sign.
Other officers see your call sign, never your name or licence number.
- Sign in with a code by text
- Licence checked on the SIA’s public register
- Pick a call sign, like Bravo 74
- Call sign onlyNever your name or licence number.
- Your pickA word and a number, like Bravo 74.
- Licence checkedAgainst the SIA’s public register.
- OnSiren IDYour SIA licence, verified, on your profile.
Made for Long Shifts.
The small things that matter on a long shift, and choices that stay yours.
Safety check
Now and then Alpha One asks how you’re doing. Only you see your answers. Never your employer, never your channel.
Critical alerts
Emergency notifications can sound through silent mode and Do Not Disturb. You can turn that off.
Your language
Speak and type in your own language. It’s written out and translated into English for everyone else.
Loud places
Loud Mode puts your channel on screen in large type, for clubs, stadiums and busy streets.
A channel that stays
Your channel stays yours wherever you go, until you choose another.
Easy to read
Dark for nights, light for daylight, and bigger text if you want it.
Your data
See what Alpha One does with your data, switch her off, or delete your account, all from Settings.
Trust & safety
Get on the network with the OnSiren app
Talk to the officers around you, raise an alert in one tap and start every shift with a brief from Alpha One.
Install the app
One app for every SIA licensed officer in the UK. Free on iPhone and Android.
- Scan the code or tap your storeTap your store below
- Verify your SIA licence
- Claim your call sign and go on air
Reserved a call sign before launch? Sign up with the same phone number and it is waiting for you.
