Apex Fusion vs CertusAlert
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Apex Fusion
Remotely monitor and control your aquarium's equipment, including lights, pumps, and heaters. Observe your aquatic environment through connected webcams and receive instant alerts for critical issues. Manage multiple aquariums and log important water parameters and observations.
- Remote aquarium monitoring
- Equipment control (lights, pumps, heaters)
- IP webcam observation
- Water parameter logging
- Maintenance notes
- Remote fish feeding
- Multi-aquarium management
- Real-time iOS notifications
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Your aquarium, connected. Apex Fusion brings the power of your Neptune Systems Apex to your fingertips, making it easy to monitor your aquarium, protect your aquatic life, and control your equipment from virtually anywhere. MONITOR YOUR AQUARIUM Stay connected to what matters most. Monitor aquarium conditions like temperature, pH, ORP, salinity, and more. View real-time readings and historical trends. Track water testing results, maintenance, and aquarium observations. View connected aquarium cameras and manage multiple aquariums. PROTECT WHAT MATTERS Enjoy peace of mind knowing your Apex is watching over your aquarium, even when you're away. Receive notifications when aquarium conditions need your attention. Stay informed about leaks, temperature changes, water levels, and other potential problems. Configure automated safeguards to help protect your aquarium and equipment. CONTROL WITH CONFIDENCE Take control of your aquarium equipment, at home or on the go. Control connected pumps, lighting, heaters, and other equipment. Adjust settings, schedules, and operating modes. Activate feed modes and other convenient aquarium tasks. A FRESH MOBILE EXPERIENCE Completely rebuilt with a modern look and a faster, smoother, more intuitive experience. Home screen and lock screen widgets for quick access to aquarium information. Easier group management and organization. Quick access to live previews. COMPATIBILITY & REQUIREMENTS Compatible with A1, A2, and A3 Series Apex systems. Requires a free Apex Fusion account and an internet connection for both your Apex system and mobile device. Available features vary based on your Apex system and connected equipment.
CertusAlert
Receive real-time, customizable Building Management System (BMS) alarm messages. Prioritize notifications and automatically sort messages into color-coded folders based on keywords.
- Customizable BMS alarm messaging
- Real-time notifications
- Priority filtering for alerts
- Automatic message sorting
- Color-coded folders
- Keyword-based sorting
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The CertusAlert app offers Certus Controls customers fully customizable BMS alarm messaging in real time. Features: Priority filtering so you determine what messages produce notification alerts on your device. Messages can automatically be sorted and filed in color coded folders based on keyword sorting.
Screenshots
Verdict
The clearest difference is rating: CertusAlert at 5.0 against Apex Fusion's 3.4. CertusAlert also leads on update cadence (every 10 days vs every 2 months). Apex Fusion's advantage is ratings volume (130 vs 1) and iOS requirement (17.6 vs 26.5). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
CertusAlert holds the better App Store score, 5.0 against 3.4. That said, the two scores are not equally well evidenced: Apex Fusion has 130 ratings behind it against 1, so its average is the more settled of the two.
Apex Fusion ships an update every 2 months, CertusAlert every 10 days. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.
| Parameter | Apex Fusion | CertusAlert |
|---|---|---|
| Price | Free | Free |
| Rating | 3.4 (130 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 41.8% of reviews | — |
| Number of ratings | 130 — better | 1 |
| Update frequency | Every 2 months | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad, Apple Watch — better |
| Requires iOS | 17.6 — better | 26.5 |
| Further details — not scored | ||
| Size | 50 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Neptune Systems, LLC | Darrell Iehle |
Customer experience
Apex Fusion
CertusAlert
Bugs and requests
Apex Fusion
Reported bugs
83 issues- Long periods between updates
- UI not modern
- Little problems in AFS and MXM
- Took time to figure out
- Months of troubleshooting
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- Algae outbreak due to UI
- Firmware update process unclear
- Home screen no intuitive flow
- App needs redesign
- Annoying bugs
- Repeated disconnections
- Wasting calibration solution
- Changing checkboxes to toggles
- Automatic water change task broken
- UX only supports mL
- Nightmare setup process
- No videos for setup
- Nothing is labeled
- Low water level never worked
- PH checker quit working
- Doesn't work on 5g network
- Complicated to adjust things
- iPad mini 2 crash
- App crashes
- Connection issues
- Equipment disconnected many times
- No equipment connected after restart
- App crashes repeatedly
- DOS unit crashes power bank
- Heater output failed
- App stops working
- Salinity probe useless
- App doesn't respond properly
- Turned on/off incorrectly
- App crashes on iPad
- Bluetooth app does not load
- Setup doesn't save in account
- Keeps logging out
- Constantly prompts to login
- Unauthorized screen
- UI buttons too small and close
- Sliders for enable/disable are problematic
- Scheduled tasks forced on/off
- Buttons bounce around screen
- Swipe up gesture for dashboard
- Abysmal rate of errors
- TOUCH errors
- Lost password issues
- App frozen on startup
- App stalls at launch
- App renders wrong
- Confusing workflow
- Doesn't feel like an iOS app
- Swipe gestures don't go back
- Doesn't utilize tab bar
- BETA UI is buggy and slow
- BETA UI doesn't render consistently
- Clunky and jumbled mess
- App crashes 15 times in 5 minutes
- App crashes on login
- Login error on app
- Webview wrapped app
- Logs out every 5 seconds
- Camera not loading in app
- Outlet problems since iOS 11
- Device name length limitations
- Excess chrome in UI
- Overly complicated
- No way to reset password
- Support lacking in app
- Contact support link broken
- Open manual link broken
- Forum login difficult
- Pointless app
- Junk app
- System not working for months
- Apex support non-existent
- Cannot use iPad to run Apex
- No zero-star option
- Kein Deutsch
- Cannot get access to technology
- Difficult to make components on/off manually
- UI looks like old Nokia phone
Requested features
18 requests- Add widget for iOS
- Add widget support
- Add widget for iOS Home Screen
- Add widget dashboard
- Add live activities for parameters
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- Add Apple Watch notifications
- Add Apple Watch parameter display
- Add ability to customize start page
- Add Siri Shortcuts for feed modes
- Add Siri support
- Add HomePod support
- Add HomeKit compatibility
- Add Siri and UI updates
- Add camera compatibility
- Add custom widgets
- Improve graphing interface
- Improve notification badges
- Improve Siri Shortcut functionality
CertusAlert
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Apex Fusion
No in-app purchases
CertusAlert
No in-app purchases
