Comparison

Fish Tank Tracker vs AquaKeeper

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

Head to head
About

Fish Tank Tracker

Features
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Fish Tank Tracker is the lab notebook your aquarium deserves: log a full water test in seconds, watch the trends, and never miss another water change. Built for reef, FOWLR, saltwater, freshwater and brackish tanks โ€” and built to work entirely offline, with no account and no subscription. TEN PARAMETERS, LOGGED IN SECONDS - Temperature, salinity (ppt or specific gravity), pH, ammonia, nitrite, nitrate, alkalinity, calcium, magnesium and phosphate - Quick mode for the everyday basics, Full Test for lab day - Optimal ranges and your last reading shown while you type, notes on every test - A reading that looks like a typo (42 for 420) is questioned before it's saved - Type phosphorus in ppb straight from a Hanna ULR checker - Type alkalinity in dKH, meq/L or ppm, as your test kit reads it - Set your own target range for any parameter, tank by tank - Log a test you took yesterday, or fix one you mistyped - Share any test as text, for a second opinion on the forums CHARTS THAT TELL THE STORY - Every parameter charted against its optimal band, over 30 days, 90 days, a year or all time - Tap a chart for any reading, with your water changes marked on it - Color-coded status on the dashboard: optimal, acceptable or critical at a glance - Every reading shows how it moved since your last test - Spot a slow drift weeks before it becomes a problem LIVESTOCK JOURNAL - Fish, corals and invertebrates with species names and photos - Purchase dates, quantity, cost and health status EQUIPMENT & MAINTENANCE - An inventory of lights, pumps, heaters, skimmers and more - Recurring tasks per piece of equipment: clean the skimmer cup, swap filter floss, wipe the lens - A reminder notification when a task comes due, plus a weekly test-day reminder on the day and time you choose WATER CHANGES & DOSING - Log water changes by percent or volume, even from earlier days, and fix them later - Dosing calculator for alkalinity, calcium and magnesium โ€” pick your product, get millilitres for your exact water volume - Big corrections are split into daily doses, never faster than the product's label allows - Dose straight from a test: the calculator starts from your latest reading and your own target - Water change calculator: how much salt to mix, and how far nitrate and phosphate will drop YOURS, OFFLINE - Everything is stored in a local database on your device - Free backup and restore: save everything to Files or Drive, and move it to a new phone - No account, no login, no cloud, no tracking โ€” and no ads - Gallons or liters for each tank, ยฐF or ยฐC FREE AND PRO The free version is a complete toolkit for one tank: all ten parameters with charts, a month of history, five livestock entries, and every equipment, maintenance and dosing tool. Pro is a single one-time purchase โ€” never a subscription โ€” and unlocks unlimited tanks, unlimited history, unlimited livestock, trend analysis with stability scores, and CSV export. Whether you are cycling your first ten-gallon or dialing in a mature reef, Fish Tank Tracker keeps the numbers so you can enjoy the fish. Privacy policy: https://fish.chinesepowered.com/privacy.html

About

AquaKeeper

Features
Read full description

Track every tank. Catch problems early. Never miss maintenance. Scan a liquid test kit with your camera and AquaKeeper logs the reading for you. Then it charts every parameter, scores each tank's health, and flags what needs attention โ€” before small problems get expensive. TEST KIT SCANNER Point your camera at an API, Red Sea, or Salifert liquid test kit. AquaKeeper reads the color against a reference card and logs the result for you โ€” no more squinting at a color chart or typing numbers by hand. WATER TEST LOGGING Log pH, ammonia, nitrite, nitrate, phosphate, calcium, alkalinity, magnesium, salinity, and temperature. Beautiful charts show trends over 7, 30, 90 days or all time. Safe-range lines tell you instantly if a parameter is off. Tap any data point for the exact reading. HEALTH SCORES Every tank gets a 0โ€“100 health score calculated from your recent water tests. See at a glance which tanks are thriving and which need attention โ€” before small problems become expensive ones. SMART COACH AquaKeeper watches your recent tests, livestock, and tasks, then flags what actually needs attention โ€” a KH that's been sliding for days, nitrate trending up, a water change running late. Plain-language insights land in your Today tab, not a dashboard you have to interpret yourself. LIVESTOCK TRACKER Log every fish, coral, and invertebrate with species name, purchase price, date added, and current status. Browse 200+ species with care guides, minimum tank size, temperature and pH ranges. Compatibility warnings alert you before adding a new inhabitant that may conflict with your existing livestock. MAINTENANCE SCHEDULER Create recurring tasks for water changes, filter cleanings, media replacements, and anything else your tank needs. The Today tab shows all overdue and due-today tasks across every tank in one view. Push notifications remind you before tasks slip. EQUIPMENT LOG Track pumps, lights, skimmers, heaters, and reactors. Log purchase date, price, and warranty expiry. Get highlighted warnings when warranties are approaching. See your total equipment investment per tank. PHOTO LOG Document your tank's journey. A photo timeline shows how your aquascape and corals have grown over months and years. Tap any photo for fullscreen view with pinch-to-zoom. iPHONE AND iPAD AquaKeeper works natively on iPhone and iPad โ€” including a sidebar layout on iPad โ€” with optimized layouts for both. Your data syncs automatically across all your Apple devices via iCloud at no extra cost. SUPPORTED TANK TYPES Reef ยท Freshwater ยท Planted ยท Brackish AquaKeeper is free to download. Optional subscriptions are available. See App Store for details. SUBSCRIPTION: โ€ข Payment charged to Apple ID at confirmation of purchase. โ€ข Auto-renews unless canceled at least 24 hours before renewal. โ€ข Manage or cancel subscriptions in Settings > Apple ID > Subscriptions. REACH US: *** Privacy Policy: https://bit.ly/3JACPMM *** Terms of Use: https://bit.ly/4qYKR2R *** Support: actiondriven.business@gmail.com Requires iOS 17.0 or later.

Screenshots

Fish Tank Tracker4 screens
AquaKeeper4 screens

Verdict

The call

The clearest difference is ads: Fish Tank Tracker at none against AquaKeeper's shown. Fish Tank Tracker also leads on update cadence (every 3 weeks vs every 2 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Fish Tank Tracker sells 1 one-off in-app purchase and AquaKeeper sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Fish Tank Tracker ships an update every 3 weeks, AquaKeeper every 2 months. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard2 real differences ยท 4 level
Fish Tank Tracker versus AquaKeeper: the parameters behind the verdict, then further details
ParameterFish Tank TrackerAquaKeeper
PriceFreeFree
Update frequencyEvery 3 weeks โ€” betterEvery 2 months
AdsNo โ€” betterYes
In-app purchasesYesYes
DevicesiPhone, iPad โ€” betteriPhone
Requires iOS16.4 โ€” better17.0
Further details โ€” not scored
Size55 MB18 MB
Age rating4+4+
DeveloperNelson LaiTrang Le

In-app purchases

1 purchases

Fish Tank Tracker

One-time1
  • Lifetime Pro Pack$9.99
3 purchases

AquaKeeper

Subscriptions2
  • One Month$0.991 Month
  • One Year$8.991 Year
One-time1
  • Lifetime$12.99

Questions

Is Fish Tank Tracker free?
Fish Tank Tracker is free to download, with in-app purchases available.
Is AquaKeeper free?
AquaKeeper is free to download, with in-app purchases available.
Do Fish Tank Tracker or AquaKeeper have ads?
AquaKeeper shows ads; Fish Tank Tracker does not.
Which is updated more often, Fish Tank Tracker or AquaKeeper?
Fish Tank Tracker ships an update every 3 weeks, and AquaKeeper every 2 months. Most recently, Fish Tank Tracker was updated on November 3, 2026 and AquaKeeper on October 31, 2026.

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