Comparison

Ajax Security System vs Control NOVA II

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

Head to head
About

Ajax Security System

Monitor your home or office security, receive instant alerts, and manage video surveillance and automation from a single interface. Arm/disarm your system, view visual alarm verification, and create custom automation scenarios for enhanced safety and convenience.

Highlights
  • Arm and disarm system remotely
  • Real-time event monitoring
  • Instant critical alerts
  • Visual alarm verification
  • Automation scenario creation
  • Mobile panic button
  • Manage multiple spaces
Features
Read full description

Ajax Security System keeps you informed about what's happening at your space. Monitor Ajax system status, receive instant alerts, and manage security, video surveillance, and automation through a single intuitive interface. IN THE APP: - Arm and disarm your system with one tap - Monitor events and system status in real time - Receive critical alerts — even when your phone is in silent mode - View visual alarm verification with photos and video - Create automation scenarios - Use the mobile panic button in emergencies - Manage multiple spaces from one account, and more Over 4.5 million end users in more than 180 countries worldwide trust Ajax. We offer end-to-end solutions for protecting homes and businesses оf any scale. Ajax product portfolio includes over 300 devices for: - Intrusion protection - Video surveillance - Fire and life safety - Comfort and automation BUILD YOUR OWN SECURITY AND COMFORT WITH AJAX A SINGLE INTEGRATED ECOSYSTEM Ajax is a unified ecosystem in which intrusion protection, video surveillance, fire safety, water leak prevention, and automation work seamlessly together. You can add new devices and scale your system as space requirements grow — without compatibility issues, complex setup, or redesigning everything from scratch. INSTANT ALERTS WITH VISUAL PROOF You don't miss important events — you know exactly when and how to respond. When an intrusion, fire, or water leak is detected, the app sends a critical alert that breaks through Do Not Disturb mode. Visual alarm verification from Ajax cameras or MotionCam detectors helps you quickly understand what's happening on site. VIDEO SURVEILLANCE YOU CAN TRUST Watch live video or browse the archive directly in the app. Footage is synchronized with system events, giving you a clear visual context for every alarm and complete situational awareness. To protect your privacy, video streams use secure proprietary transmission technology, while passwordless camera authentication minimizes the risk of unauthorized access. AUTOMATION FOR ENHANCED SECURITY AND ROUTINES Set your system to operate automatically. Change security modes on a schedule, turn on lighting when motion is detected, shut off water in case of a leak, or control locks, gates, heating, and appliances. Automation scenarios run in the background — even without an internet connection — while you focus on your day. PROFESSIONAL RESPONSE, ONE TAP AWAY Connect your system to a monitoring company to access professional security services with fast alarm response. The largest alarm receiving centers and a wide range of CMS software in more than 180 countries support Ajax systems. In an emergency, press the in-app panic button to instantly transmit the event and your smartphone's location to the rapid response unit. • • • Ajax equipment is required to use the app. Devices are available from authorized Ajax Systems partners. Learn more at ajax.systems

About

Control NOVA II

This app provides comprehensive remote access to your security system. Arm or disarm your system, monitor zone status, control automated devices like heating and lighting, and receive instant PUSH notifications for events. It also allows viewing live camera streams and managing system users.

Highlights
  • Remote arming/disarming
  • Zone status monitoring
  • Control of automatics (heating, lighting)
  • Event log viewing
  • User management
  • PUSH notifications
  • Security camera stream viewing
Features
Read full description

Wherever you are, all you need to do is connect your smartphone to the Internet. Control NOVA II gives complete remote access to your security system: - Arming/disarming of the security system. - View the status of zones. - Control of automatics - heating, lighting, water supply and more. - View the event log with detailed event information. - View ahd configure system users by the Administrator. - Instant reception of information from the security system in the form of PUSH messages (alarms, faults, arming/disarming, etc.). - View streams from security cameras (RTSP connection). - View information about the status of remote monitoring of the object. Each session of communication with your security system is protected by an access code or a fingerprint (3D face) scan. The exchange of information takes place in an encrypted form. The application supports simultaneous operation with different objects. This may be your apartment, house, office, garage, etc.

Screenshots

Ajax Security System4 screens
Control NOVA II4 screens

Verdict

The call

The clearest difference is review sentiment: Ajax Security System at 73% against Control NOVA II's 0%. Ajax Security System also leads on rating (4.3 vs 2.8) and update cadence (fortnightly vs every 2 months). Control NOVA II's advantage is iOS requirement (15.0 vs 18.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

Ajax Security System holds the better App Store score, 4.3 against 2.8. That said, the two scores are not equally well evidenced: Ajax Security System has 270 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 73% of Ajax Security System's written reviews are positive against 0% of Control NOVA II's.

UpkeepUpdate frequency

Ajax Security System ships an update fortnightly, Control NOVA II every 2 months. The most recent releases landed on September 23, 2026 and September 11, 2026 respectively.

Scorecard5 real differences · 5 level
Ajax Security System versus Control NOVA II: the parameters behind the verdict, then further details
ParameterAjax Security SystemControl NOVA II
PriceFreeFree
Rating4.3 (270 ratings) — better2.8 (6 ratings)
Positive reviews73.0% of reviews — better0.0% of reviews
Number of ratings270 — better6
Update frequencyFortnightly — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, Apple WatchiPhone, iPod, Apple Watch — better
Requires iOS18.015.0 — better
Further details — not scored
Size727 MB109 MB
Age rating4+4+
DeveloperAjax Systems IncTIRAS-12, TOV

Customer experience

Ajax Security System

All ratings270 ratings
Positive83.0%
Neutral4.1%
Negative13.0%
Written reviews670 reviews
Positive73.0%
Neutral12.2%
Negative14.8%

Control NOVA II

All ratings6 ratings
Positive33.3%
Neutral0.0%
Negative66.7%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

Ajax Security System

Reported bugs

5 issues
  • App freezing when accessing notifications
  • Geofencing not working as expected
  • Delayed response when arming/disarming
  • Accidental panic button triggers
  • Connectivity issues after WiFi changes

Requested features

5 requests
  • Ability to schedule night mode
  • More sound options for door chimes
  • Improved iPad app experience
  • Siri/HomeKit integration
  • Customizable alarm volume and notifications

Control NOVA II

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Ajax Security System

No in-app purchases

None

Control NOVA II

No in-app purchases

Questions

Is Ajax Security System free?
Ajax Security System is free to download, with no in-app purchases.
Is Control NOVA II free?
Control NOVA II is free to download, with no in-app purchases.
Which has better reviews, Ajax Security System or Control NOVA II?
Ajax Security System is rated higher. Ajax Security System averages 4.3 out of 5 from 270 ratings, while Control NOVA II averages 2.8 from 6 ratings.
Do Ajax Security System or Control NOVA II have ads?
Neither Ajax Security System nor Control NOVA II shows ads.
Which is updated more often, Ajax Security System or Control NOVA II?
Ajax Security System ships an update fortnightly, and Control NOVA II every 2 months. Most recently, Ajax Security System was updated on September 23, 2026 and Control NOVA II on September 11, 2026.

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