Comparison

AquaticLog vs HYDROS App

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

Head to head
About

AquaticLog

Manage your aquarium with this comprehensive platform. Track water parameters, schedule maintenance, log livestock, and document your tank's progress with photos and videos. Connect controllers for automatic data import and sync across devices.

Highlights
  • Water parameter tracking
  • Smart reminders for maintenance
  • Livestock management
  • Equipment and dosing logs
  • Controller integration
  • Photo and video diary
  • Community features
Features
Read full description

AquaticLog keeps water parameters, livestock, equipment and care routines together for every freshwater tank and reef. ONE ACCOUNT, EVERY DEVICE Your log lives in your AquaticLog account, not on your phone. Sign in on a new iPhone, an iPad or the web at aquaticlog.com and everything is already there. Aquarists have trusted AquaticLog with their records for over 13 years. Keep your tanks on the iPhone Home Screen with widgets. WATER PARAMETERS Log pH, temperature, ammonia, nitrite, nitrate, phosphate, salinity, alkalinity, calcium, magnesium and more. Clear trend charts let you catch a swing before it reaches your fish or corals. Connect a Neptune Apex, Hydros, AquaWiz or Seneye for hourly readings, including Seneye NH3 and NH4. Delete bad readings in batches and schedule retests for out-of-range results. LIVESTOCK AND PLANTS Build a detailed record of every fish, coral, invertebrate, plant and amphibian you own. Add a photo as you add a new fish or coral. Track sex, temperament, diet, difficulty and reef-safety, and move inhabitants between tanks as your collection grows. Tank birthdays and gotcha days share a card you can dismiss. MAINTENANCE MADE SIMPLE Schedule water changes, dosing, feeding, testing and equipment cleaning. Smart reminders make sure nothing slips. Check off a task and it lands with a haptic; once nothing is due, your tank shows what's next. A daily streak beside Reminders rewards showing up. End a repeating schedule on a date or after a set count, and see your maintenance time per week. Service accounts can start client visits and finish them with notes and next-visit plans. DOSING AND FEEDING Track dosing and feeding with a precise history. Log feeding every 48 hours or at another fixed interval. Re-dose additives, repeat feedings and repeat water changes in one tap, prefilled with your last amounts. Repeated doses and feedings fold into one row per day. FISH ROOM AND WATER CHANGES Set up RO/DI with SpectraPure, BRS and Waterbox presets. Track filter changes and TDS for each membrane and DI stage. Manage supplies and spending in Fish Room, with INR support. PHOTO TIMELINE Track growth and coloration. Then vs Now slides between your first photo and your latest, with dates and tank age. Pinch to zoom. Start a build thread for your tank on the community forum and post what changed as it grows. ADVANCED TESTING Log ICP analyses and PAR readings. ICP warnings stay grouped; dismiss individual results and restore them anytime. Share test-kit reagents across tanks in Fish Room: logged tests count supplies down, with fill levels and days left. EQUIPMENT Track pumps, lights and filters, with ratings and reviews. Browse products by category or brand, see which tanks use them, and add them to your tank or shopping list. A spending report totals what you've paid per store, filterable by tank and date range (Pro). EXPLORE AND CONNECT Search public tanks by what lives in them — look for a torch coral in the 15-30 gallon range and see how other nano reefs are scaped. Filter by style (mixed reef, SPS, LPS, soft coral, planted, macro algae, fish only), size, water type and activity, then open any tank to see its photos, parameters, gear and livestock. Find Today, Aquariums, Species, Products and News together in Explore. Read reviews, like photos and earn achievements. Make your tank public to share its link, or copy a snapshot of its parameters, livestock and gear to ask for advice. Available in English, German, Spanish, French, Italian, Dutch, Polish, Russian, Ukrainian and Brazilian Portuguese. Start for free — new accounts log water parameters without limits for 30 days — then upgrade to Pro for advanced tracking and tools. The yearly plan starts with a 7-day free trial. Get daily AI suggestions based on tank data and see when each was generated. Privacy Policy: https://www.aquaticlog.com/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

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.

Highlights
  • 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
Features
Read 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.

Screenshots

AquaticLog4 screens
HYDROS App3 screens

Verdict

The call

The clearest difference is rating: AquaticLog at 4.2 against HYDROS App's 3.6. AquaticLog also leads on update cadence (every 10 days vs every 3 months) and ratings volume (406 vs 23). HYDROS App's advantage is in-app purchases (none vs 3) and iOS requirement (15.6 vs 18.1). On price, review sentiment, ads and device support 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. AquaticLog sells 3 in-app purchases, starting at $4.99 per month. HYDROS App asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

AquaticLog holds the better App Store score, 4.2 against 3.6. That said, the two scores are not equally well evidenced: AquaticLog has 406 ratings behind it against 23, so its average is the more settled of the two. Written reviews point the same way: 70% of AquaticLog's written reviews are positive against 62% of HYDROS App's.

UpkeepUpdate frequency

AquaticLog ships an update every 10 days, HYDROS App every 3 months. The most recent releases landed on October 25, 2026 and October 22, 2026 respectively.

Scorecard6 real differences · 4 level
AquaticLog versus HYDROS App: the parameters behind the verdict, then further details
ParameterAquaticLogHYDROS App
PriceFreeFree
Rating4.2 (406 ratings) — better3.6 (23 ratings)
Positive reviews69.7% of reviews — better62.3% of reviews
Number of ratings406 — better23
Update frequencyEvery 10 days — betterEvery 3 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.115.6 — better
Further details — not scored
Size25 MB70 MB
Age rating4+4+
DeveloperLonnex IncCoralvue

Customer experience

AquaticLog

All ratings406 ratings
Positive80.8%
Neutral3.2%
Negative16.0%
Written reviews221 reviews
Positive69.7%
Neutral5.4%
Negative24.9%

HYDROS App

All ratings22 ratings
Positive63.6%
Neutral9.1%
Negative27.3%
Written reviews77 reviews
Positive62.3%
Neutral7.8%
Negative29.9%

In-app purchases

3 purchases

AquaticLog

Subscriptions2
  • Pro Monthly Subscription$4.991 Month
  • Pro Yearly Membership7 Days trial$39.991 Year
One-time1
  • Pro Lifetime Membership$149.99
None

HYDROS App

No in-app purchases

Questions

Is AquaticLog free?
AquaticLog is free to download, with in-app purchases available.
Is HYDROS App free?
HYDROS App is free to download, with no in-app purchases.
Which has better reviews, AquaticLog or HYDROS App?
AquaticLog is rated higher. AquaticLog averages 4.2 out of 5 from 406 ratings, while HYDROS App averages 3.6 from 23 ratings.
Do AquaticLog or HYDROS App have ads?
Neither AquaticLog nor HYDROS App shows ads.
Which is updated more often, AquaticLog or HYDROS App?
AquaticLog ships an update every 10 days, and HYDROS App every 3 months. Most recently, AquaticLog was updated on October 25, 2026 and HYDROS App on October 22, 2026.

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