Apex Fusion vs Reefability
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
Read full descriptionHide full description
The Apex is the world’s most popular aquarium monitoring and control system. From anywhere in the world, with your internet-connected Apex system and this app, you can: - Monitor the health of your aquarium by observing current and past history of your Temperature, pH, ORP, Salinity and much more (depending on how your Apex System is equipped of course) - Control the equipment on your aquarium - lights, pumps, heater, etc. Turn them off and on, adjust the lighting spectrum, change pump modes and many other functions. - Observe your aquarium via connected IP web cams. - Enter key water testing parameters such as Alkalinity, Calcium, Phosphates, etc. - Enter notes about observations of your aquarium, maintenance, fish health, etc. - Remotely feed your fish, right from your handheld device! - Monitor and control more than one aquarium - either yours or friends. - Get immediate iOS notifications when something goes wrong in your aquarium (leaks, overheating, pH out of range, water level issues, etc.) Requires: Any Apex System (Apex, ApexEL, Apex Classic, Apex Gold, Apex Lite, or Apex Jr.) The Apex, and your iOS device, must both be connected to the internet An Apex Fusion account (Apex Fusion is our free, cloud-based service)
Reefability
This AI-powered app offers scientific precision for managing coral reef aquariums. It analyzes microbiome health, water chemistry, and light optimization, and can identify issues from tank photos. It provides tools for hobbyists and professionals to maintain thriving reef ecosystems.
- AI-driven analysis of reef tank health
- Smart photo diagnostics for issue identification
- Evidence-based solutions and recommendations
- Ecosystem stability insights
- Professional tools for reef stores and professionals
- Integrated parameter monitoring
Read full descriptionHide full description
The reef app that sees your whole tank. Reefability connects your chemistry, livestock, light, flow, microbiome and dosing, so every answer takes your entire reef into account. Built for reef tanks only, by reefers who did the research first. Reefability was the first AI-powered reef aquarium app, and it has now been rebuilt from the ground up as Reefability Symbiosis. YOUR TANK, BUILT RIGHT Guided tank setup, drawn live as you go, with the true water volume after sand and rock Cycling mode and Quarantine mode, each with the tools that stage needs Farm and grow-out tanks, plus connected systems that share one body of water REEF MAP Turn one front photo into a 3D model of your real rockwork Place your lights and pumps, then tap any spot for estimated PAR and flow Every coral is graded against the light and flow where it actually sits CHEMISTRY AND NUTRIENTS Log readings by voice, by photo of your test kit, or from your controller Upload ICP and DOC lab reports and see risks and trends on the same charts Ideal ranges that follow your tank, so a soft coral reef isn't held to SPS numbers See whether your filtration keeps up with your bioload, and which method does the work DOSING 400+ supplements from 27 brands, with strengths taken from each maker's label Dose suggestions based on your latest test and your water volume Connected dosers, bottle tracking and reminders Captiv8, Triton, Red Sea and Modern Reef dosing methods LIVESTOCK AND CORALS Add animals by name, by photo, or by scanning your store receipt Care sheets for 500+ species, with bioload and tankmate warnings before you buy Coral Growth: a photo every two weeks tracks size, pace and color over time Compatibility reports that show what to expect before you add an animal PESTS AND MICROBIOME Identify pests from photos, pin them on your 3D tank, and follow them until they're gone A microbiome care score, with guided recovery after medication or a deep clean SAFETY PLANS Weather and air quality alerts for your area, turned into prep lists sized for your tank Smoke warnings if your skimmer pulls in outdoor air Know how many hours your pumps will run on backup power PEOPLE AROUND YOUR REEF Sitter mode: give a sitter a simple code, daily tasks and a help button Experts: book a video call with a reef expert who sees your tank data ahead of time Reefers: share your tank, ask the community and join testing challenges FOR STORES, FARMS AND MAINTENANCE COMPANIES Team mode: manage staff with their own access codes, assign tasks per tank, and keep client tank details and routes in one place REEFER AI An assistant that reads your entire tank, not just one number Charts on demand when numbers need a picture Talk out loud when your hands are wet, and leave voice notes CONNECTED Works with reef controllers and test devices, including Neptune Apex, GHL, Red Sea, CoralVue Hydros, Aquarino, Jabao, Focustronic, Aquawiz and Xepta. Available in multiple languages.
Screenshots
Verdict
The clearest difference is in-app purchases: Apex Fusion at none against Reefability's 9. Apex Fusion also leads on rating (3.4 vs 3.2) and ratings volume (130 vs 37). Reefability's advantage is update cadence (daily vs every 2 months) and device support (5 vs 3). On price, review sentiment, ads and iOS requirement 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. Reefability sells 9 in-app purchases, starting at $9.99 per month. Apex Fusion asks for nothing beyond the download.
Apex Fusion holds the better App Store score, 3.4 against 3.2. Both are backed by a comparable volume of ratings — 130 and 37 respectively. Written reviews point the same way: 42% of Apex Fusion's written reviews are positive against 38% of Reefability's.
Apex Fusion ships an update every 2 months, Reefability daily. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.
| Parameter | Apex Fusion | Reefability |
|---|---|---|
| Price | Free | Free |
| Rating | 3.4 (130 ratings) — better | 3.2 (37 ratings) |
| Positive reviews | 41.8% of reviews — better | 38.2% of reviews |
| Number of ratings | 130 — better | 37 |
| Update frequency | Every 2 months | Daily — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Apple TV, Apple Watch — better |
| Requires iOS | 15.0 | 15.0.0 |
| Further details — not scored | ||
| Size | 53 MB | 119 MB |
| Age rating | 4+ | 4+ |
| Developer | Neptune Systems, LLC | Reefability |
Customer experience
Apex Fusion
Reefability
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
Show 78 moreShow fewer
- 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
Show 13 moreShow fewer
- 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
Reefability
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Apex Fusion
No in-app purchases
Reefability
- 1-Month2 Months trial$9.991 Month
- Controller plan (monthly)$11.991 Month
- 12-Month$34.991 Year
Show 1 moreShow fewer
- Controller plan (annual)$49.991 Year
- Day pass$1.99
- 5 tank rebuilds$2.99
- Week pass$4.99
Show 2 moreShow fewer
- 15 tank rebuilds$6.99
- Month pass$12.99





