ReefDoser vs HYDROS App
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ReefDoser
This app helps tropical marine aquarium owners calculate precise dosages for essential elements like Calcium, Magnesium, and Alkalinity. It features an extensive database of over 70 products to ensure optimal water parameters for your reef tank.
- Element dosage calculation
- Calcium, Magnesium, Alkalinity tracking
- Potassium, Iodine, Strontium, Boron, Silicate
- Product database (70+ items)
- Tropical marine aquarium focus
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Reef Calculator for tropical marine aquariums, to help calculate the correct dosages of specific elements needed to maintain recommended levels. Current elements are Calcium, Magnesium, Alkalinity, Potassium, Iodine, Strontium, Boron & Silicate. Choose products from over 70 items in our updated database
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
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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.
Screenshots
Verdict
The clearest difference is rating: HYDROS App at 3.7 against ReefDoser's 1.0. HYDROS App also leads on ratings volume (22 vs 1) and review sentiment (62% vs 54%). ReefDoser's advantage is iOS requirement (10.0 vs 15.6). On price, update cadence, ads and in-app purchases 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.
HYDROS App holds the better App Store score, 3.7 against 1.0. That said, the two scores are not equally well evidenced: HYDROS App has 22 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 54% of ReefDoser's written reviews are positive against 62% of HYDROS App's.
Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 9, 2026 and October 18, 2026 respectively.
| Parameter | ReefDoser | HYDROS App |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) | 3.7 (22 ratings) — better |
| Positive reviews | 54.2% of reviews | 62.3% of reviews — better |
| Number of ratings | 1 | 22 — better |
| Update frequency | Every 3 months | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 10.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 23 MB | 70 MB |
| Age rating | 4+ | 4+ |
| Developer | Pixelwand Ltd | Coralvue |
Customer experience
ReefDoser
HYDROS App
In-app purchases
ReefDoser
No in-app purchases
HYDROS App
No in-app purchases
