Monitored vs Unmonitored Alarms: What's the Difference?

An unmonitored (bells-only) alarm simply sounds a loud siren to scare off an intruder and alert neighbours. A monitored alarm also sends the alert somewhere - an Alarm Receiving Centre or your phone - so there's a response even when you're out. Smart alarms like Hikvision AX PRO sit in the sweet spot: free self-monitoring through the app, with professional monitoring optional.

Unmonitored (bells-only)

The classic setup: when triggered, the siren and strobe go off. It's a strong deterrent, has no ongoing cost, but relies on someone nearby hearing and acting. Fine for many homes.

Monitored

A monitored alarm signals an Alarm Receiving Centre (ARC) when it triggers; they verify and escalate to keyholders or, for approved systems, the police. It's the most hands-off option but comes with an ongoing monthly fee.

Self-monitoring (the modern middle ground)

Systems like AX PRO push an instant alert to your phone the moment a sensor trips, so you can see what's happening and act - all free through the app, no monthly fee. You can add professional ARC monitoring later if you want it. For most homes this gives the response of monitoring without the contract. See the best no-monthly-fee alarms.

Browse Hikvision AX PRO alarms.

Frequently asked questions

What is the difference between monitored and unmonitored alarms?
An unmonitored (bells-only) alarm just sounds a siren. A monitored alarm also sends the alert to a monitoring centre or your phone for a response. Smart alarms self-monitor free via an app.

Do I have to pay monthly for an alarm?
Not necessarily. A bells-only or self-monitored smart alarm has no monthly fee. You only pay monthly if you choose professional Alarm Receiving Centre monitoring.

Is a bells-only alarm enough?
For many homes, yes - it's a strong visible deterrent. Adding free app self-monitoring (as on AX PRO) gives you alerts when you're away without an ongoing cost.