Comparison

Aquarist's Notes vs AquaSense.fish

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

Head to head
About

Aquarist's Notes

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Aquarium health monitoring app. The Aquarist's Notes allows you to record important water parameters such as temperature, pH, hardness and other factors that affect fish and plant health, add notes and keep a diary. You can add photos from the system photo album directly to the app and add comments or save documents such as aquarium inventory guides. All of this information will be easily accessible and organized right in the app. The Aquarist's Notes will make calculations related to water treatment easier. The app provides accurate calculations of the amount of additives and chemicals you need for proper water treatment in aquariums. Calculators are available for calculating water volume depending on tank dimensions and amount of decorations, for unit conversions and more. Reminders and a calendar will simplify your aquarium maintenance planning and you'll never forget anything important again. Thanks to iCloud, all information can be available on all your devices. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://aquariumnote.lvslo.eu/app-privacy.html

About

AquaSense.fish

This app helps you maintain healthy aquariums by monitoring water parameters, identifying fish from photos, and providing compatibility information. It offers tools for planning tank setups, tracking livestock, and logging maintenance, with AI-powered guidance for both freshwater and saltwater tanks.

Highlights
  • Water parameter monitoring (pH, ammonia, etc.)
  • Photo-based fish identification
  • Livestock compatibility checker
  • Species library with care requirements
  • Tank build planning tool
  • Maintenance logging and reminders
  • AI-powered care guidance
Features
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AquaSense is the all-in-one companion for keeping a healthy freshwater or saltwater aquarium. Whether you run a nano reef, a planted community tank, or a big cichlid setup, AquaSense turns guesswork into clear, confident care. YOUR TANK'S HEALTH AT A GLANCE See pH, ammonia, nitrite, nitrate, KH, salinity and more the moment you open the app. Every reading is checked against the ideal range for your water type and livestock, so you instantly know what's fine and what needs attention. IDENTIFY ANY FISH FROM A PHOTO Not sure what you're looking at — at the store or in your own tank? Snap a photo and AquaSense identifies the species, then tells you how to care for it. KNOW WHAT LIVES WELL TOGETHER Before you add a new fish, check it against everything already in your tank. AquaSense flags aggression, size mismatches, and other conflicts so you avoid costly mistakes. TRACK EVERY FISH YOU KEEP Build a livestock list for each tank, with care levels, temperament, and notes. Tap any fish for a full species profile. A DEEP, TRUSTED SPECIES LIBRARY Browse a growing library of freshwater and saltwater species with real care requirements — temperature, parameters, diet, tank size, and compatibility. PLAN BEFORE YOU BUY Sketch out a tank build — water type, size, filtration, and stocking — and see whether it works before you spend a cent. CARE TOOLS BUILT IN Log water changes and maintenance, set reminders, and get AI-powered guidance tailored to your specific tank. AQUASENSE PRO Upgrade to Pro for unlimited photo fish ID, the full AI assistant, and advanced care insights. Subscriptions are billed through your app store account and can be managed or canceled anytime in your account settings. Freshwater or saltwater, beginner or expert — AquaSense helps you keep your fish healthy and your water right. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://aquasense.fish/privacy

Screenshots

Aquarist's Notes4 screens
AquaSense.fish4 screens

Verdict

The call

The clearest difference is in-app purchases: AquaSense.fish at none against Aquarist's Notes's 2. On price, update cadence, 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. Aquarist's Notes sells 2 in-app purchases, starting at $1.99 per month. AquaSense.fish asks for nothing beyond the download.

UpkeepUpdate frequency

Aquarist's Notes ships an update every 6 days, AquaSense.fish every 5 days. The most recent releases landed on September 30, 2026 and October 11, 2026 respectively.

Scorecard1 real difference · 9 level
Aquarist's Notes versus AquaSense.fish: the parameters behind the verdict, then further details
ParameterAquarist's NotesAquaSense.fish
PriceFreeFree
Rating—5.0 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 6 daysEvery 5 days — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Freemium
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS16.415.1 — better
Further details — not scored
Size16 MB54 MB
Age rating4+17+
DeveloperLudek SloufBRYCE SCOTT SMITH

In-app purchases

2 purchases

Aquarist's Notes

Subscriptions2
  • Monthly subscription7 Days trial$1.991 Month
  • Annual subscription1 Month trial$9.991 Year
None

AquaSense.fish

No in-app purchases

Questions

Is Aquarist's Notes free?
Aquarist's Notes is free to download, with in-app purchases available.
Is AquaSense.fish free?
AquaSense.fish is free to download, with no in-app purchases.
Do Aquarist's Notes or AquaSense.fish have ads?
Neither Aquarist's Notes nor AquaSense.fish shows ads.
Which is updated more often, Aquarist's Notes or AquaSense.fish?
Aquarist's Notes ships an update every 6 days, and AquaSense.fish every 5 days. Most recently, Aquarist's Notes was updated on September 30, 2026 and AquaSense.fish on October 11, 2026.

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