Comparison

Schemelink vs OnSiren

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Schemelink

This app helps groups and schemes unify to prevent crime and anti-social behavior. It offers secure messaging, incident reporting, and meeting management to foster collaboration between members, police, and authorities for a safer environment.

Highlights
  • Secure group messaging with file sharing
  • Incident reporting
  • Meeting scheduler with reminders
  • Banned persons gallery
  • Push notifications for urgent alerts
  • Biometric login
  • DigiTalk two-way radio communication
Features
Read full description

Schemelink is the all-inclusive app to enable your scheme/group to effectively unify as an independent group to preempt crime and anti-social behaviour. Used by schemes throughout the UK as a tool to help scheme members, police & other authorities/parties to network & work together with the aim of maintaining a safe and secure environment in business premises for customers and staff. Takes the hard work out of managing your Pubwatch / Shopwatch / Townwatch / Hotelwatch scheme/group. Secure group messaging with image/file sharing, chat system, PUSH notifications, banned persons gallery, incident reporting, meeting management, voting/decision functions, member account management, for Pubwatch, Shopwatch, Townwatch, Hotelwatch.... any type of watch scheme or crime-reduction partnership/group initiative, all in compliance with Data Protection Laws. This app is the evolution of Pubwatch Online & Shopwatch Online web based portals launched back in 2006 - pubwatchonline.co.uk & shopwatchonline.co.uk This app sets up your device to receive 'push notifications' so that you don't miss important messages. You get alerts in your notification bar even when the app is closed, ... upgrade your group communications & data sharing today! Full features: - Easy to navigate with large icons that turn red when attention/action is required. - Noticeboard for posting messages, commenting. - Secure sharing / RSA 2048 bit key security. - 'Push' notification messaging alerts to your device. Receive important, urgent alerts even if app is closed! - Push notifications open app to immediately take you to where you want to be. - DigiTalk two-way radio real-time audio communications with conversation catch-up and channel watching. - Biometric login. - Individual chat or group messaging / discussion. - Cross scheme/group sharing - reach any scheme/group...everyone! - File & document sharing. - Meeting scheduler with automated reminders. - Activity logs/reports. - Banned persons gallery / mugshots / persons of interest (Data Protection Compliant). - Online web presence for you group/scheme with customisable homepage, live example: CHESTER.schemelink.co.uk - Member account management section. - Access & permissions levels can be set for each member. - Invitation tool - grow your scheme/group membership easily. Schemelink portal app opens up the full suite of online functions for scheme members. If you are an existing Pubwatchonline.co.uk or Shopwatchonline.co.uk member you are part of Schemelink and can use this app. Download Schemelink app, join the conversation and communicate with your scheme members which makes for an efficient, effective & successful scheme. Schemelink App is free to download and free to use for scheme members who perform administration duties within the scheme which includes the Coordinator (head person of the scheme/group), Police & local Authorities. A yearly membership fee applies for normal/regular users. See the Schemelink website for details.

About

OnSiren

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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 ยท 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.

Screenshots

Schemelink4 screens
OnSiren4 screens

Verdict

The call

The clearest difference is update cadence: OnSiren at weekly against Schemelink's every 18 months. Schemelink's advantage is iOS requirement (14.0 vs 16.4). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Schemelink ships an update every 18 months, OnSiren weekly. The most recent releases landed on October 10, 2026 and October 13, 2026 respectively.

Scorecard2 real differences ยท 6 level
Schemelink versus OnSiren: the parameters behind the verdict, then further details
ParameterSchemelinkOnSiren
PriceFreeFree
Positive reviews0.0% of reviewsโ€”
Update frequencyEvery 18 monthsWeekly โ€” better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeโ€”
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPad
Requires iOS14.0 โ€” better16.4
Further details โ€” not scored
Size6 MB124 MB
Age rating4+17+
DeveloperStephen DaviesOnSiren Limited

In-app purchases

None

Schemelink

No in-app purchases

None

OnSiren

No in-app purchases

Questions

Is Schemelink free?
Schemelink is free to download, with no in-app purchases.
Is OnSiren free?
OnSiren is free to download, with no in-app purchases.
Do Schemelink or OnSiren have ads?
Neither Schemelink nor OnSiren shows ads.
Which is updated more often, Schemelink or OnSiren?
Schemelink ships an update every 18 months, and OnSiren weekly. Most recently, Schemelink was updated on October 10, 2026 and OnSiren on October 13, 2026.

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