HYDROS App vs Nix Knows
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HYDROS App
Easily monitor and control your aquarium's vital parameters like temperature, pH, and salinity. Manage all your connected devices, including ATOs, lights, and pumps, with a user-friendly interface. Quick setup with preset configurations means no coding is required to get your system running.
- Monitor temperature, ORP, pH, salinity
- Control ATO, lights, heaters, pumps
- User-friendly interface
- Quick setup with presets
- Manage multiple devices and aquariums
- Set schedules and create modes
Read full descriptionHide full description
Use the CoralVue HYDROS App to control and monitor HYDROS aquarium devices from your smartphone or tablet. The user-friendly interface allows you to easily monitor your aquarium's temperature, ORP, pH, alkalinity levels, salinity, and more. With just one tap, you can control your ATO, lights, heaters, pumps, skimmer, calcium reactor, RO/DI units, etc. Setup is quick and easy! With 18+ different preset configurations and growing, it will take only minutes to get all of your equipment set up and running, with no coding required. SUPPORTED DEVICES: -HYDROS Control X2, X4, XS, XD, X3, X4, XP8, X10 -HYDROS Kraken -HYDROS Minnow -HYDROS Launch -HYDROS WaveEngine, WaveEngine LT -IceCap Gyre Dual Pump WiFi Controller DISCOVER MORE: -Intuitive interface features multiple view options such as tile, text, or graph -Adjust your view settings to light mode, dark mode, or auto, which will automatically adjust to your mobile device's settings -Ability to manage multiple HYDROS devices and aquariums from one single-screen -Monitor and control WiFi outlets -Set schedules and create modes -Archive controller settings STAY CONNECTED We welcome you to join our HYDROS community at forum.coralvuehydros.com where you can ask questions, learn more about your HYDROS devices, and connect with other aquatic hobbyists like yourself.
Nix Knows
This platform provides real-time vehicle data, including fuel consumption and emissions, when paired with a physical logger key. It simplifies fleet management by capturing GPS location using native phone capabilities, eliminating the need for separate data plans.
- Real-time vehicle data
- Fuel burn and emissions tracking
- Maintenance needs alerts
- Vehicle GPS location capture
- AI-powered monitoring
- Fleet management tools
Read full descriptionHide full description
At Nix, we are unlocking the black box of data that is hidden in your vehicle. Our platform provides real-time information about your vehicles. When paired with our vehicle logger key, our app provides you with all the data you need to manage your fleet, including; fuel burn, emissions, maintenance needs and so much more. Note: The app only works as a method to upload the data from the vehicle logger key installed in your vehicle (this is a separate physical device that is installed on the OBD2 port in a vehicle). This prevents individuals or companies from needing to buy a separate data plan just for their vehicles. Additionally, by using some of the native capabilities of the phone we can capture the vehicle's GPS location without having to install additional hardware and equipment on your vehicle, simplifying the process. You just need to plug in the physical device to your vehicle and download the application to start streaming your data in near real- time, with advanced AI monitoring.
Screenshots
Verdict
The clearest difference is rating: Nix Knows at 5.0 against HYDROS App's 3.6. Nix Knows also leads on update cadence (fortnightly vs every 3 months) and iOS requirement (13.0 vs 15.6). HYDROS App's advantage is ratings volume (23 vs 1). 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.
Nix Knows holds the better App Store score, 5.0 against 3.6. That said, the two scores are not equally well evidenced: HYDROS App has 23 ratings behind it against 1, so its average is the more settled of the two.
HYDROS App ships an update every 3 months, Nix Knows fortnightly. The most recent releases landed on October 22, 2026 and October 19, 2026 respectively.
| Parameter | HYDROS App | Nix Knows |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (23 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 62.3% of reviews | — |
| Number of ratings | 23 — better | 1 |
| Update frequency | Every 3 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 70 MB | 40 MB |
| Age rating | 4+ | 4+ |
| Developer | Coralvue | Nix App |
Customer experience
HYDROS App
Nix Knows
In-app purchases
HYDROS App
No in-app purchases
Nix Knows
No in-app purchases









