OnSiren
Intelligence for the Frontline
Free
OnSiren is a real-time shared awareness and threat intelligence platform for the UK's SIA-licensed security officers.
YOUR LOCAL THREAT INTELLIGENCE
Alpha One, the AI in the system, briefs you on what's happening around you: what's changed, what to look out for. And it warns you the moment things change.
REPORT IN SECONDS
See something worth knowing? One press reports it to the officers around you, with the location. Everybody who needs to know, knows at once.
A RADIO IN YOUR POCKET
Push-to-talk with the officers nearby. Press and hold to speak. Hear what's said around you, live.
BUILT FOR LICENSED PROFESSIONALS
A network for security officers. You need a valid SIA licence to join.
Privacy: onsiren.com/privacy · Terms: onsiren.com/terms
What's New:
Get briefed on what's happening around you. Report incidents in seconds. Push-to-talk with the officers nearby.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Radio Check: schedules, follow-up checks and spoken answers
Ranks: new levels and badges, share your rank to chat
PTT: live translation, captions and clearer audio
Zone Chat: new Loud Mode
Alerts: shows approval status, photo stamps
Channels: search, filters and a smoother map
Alpha One: improvements to the brief button and Android back
Battery: location only runs while the app is open
Fixes: freeze after locking the phone mid-alert, plus captions and transcripts
The developer, OnSiren Limited, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Health & Fitness
- Location
- Contact Info
- User Content
- Identifiers
- Usage Data
- Sensitive Info
- Diagnostics
- Other Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- OnSiren Limited
- Size
- 130.3 MB
- Category
- Social Networking
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - iPad
Requires iPadOS 16.4 or later.
- iPhone
- Languages
- English
- Age Rating
18+
- 18+
- Infrequent
Realistic Violence
Profanity or Crude Humor
Mature or Suggestive Themes
Medical Treatment information
Alcohol, Tobacco, Drug Use or References
Guns or Other Weapons
Contains
Messaging and Chat
User-Generated Content
Health or Wellness Topics
Social Media
- Copyright
- © 2026 ONSIREN LIMITED