Fish Tank Tracker

Chinese Powered Labs

In-app purchases

About this app

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 — and built to work entirely offline, with no account and no subscription.

TEN PARAMETERS, LOGGED IN SECONDS
• Temperature, salinity, pH, ammonia, nitrite, nitrate, alkalinity, calcium, magnesium and phosphate
• Quick mode for the everyday basics, Full Test for lab day
• Optimal ranges shown while you type, notes on every test

CHARTS THAT TELL THE STORY
• Every parameter charted against its optimal band
• Color-coded status on the dashboard: optimal, acceptable or critical at a glance
• 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 an optional weekly test-day nudge

WATER CHANGES & DOSING
• Log water changes by percent or volume
• Dosing calculator for alkalinity, calcium and magnesium — pick your product, get millilitres for your exact water volume
• Water change calculator for when dilution beats dosing

YOURS, OFFLINE
• Everything is stored in a local database on your device
• No account, no login, no cloud, no tracking — and no ads
• Gallons or liters, °F or °C

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 — never a subscription — and unlocks unlimited tanks, unlimited history, unlimited livestock, trend analysis with stability scores, and CSV export.

Whether you are cycling your first ten-gallon aquarium or dialing in a mature reef tank, Fish Tank Tracker keeps the numbers so you can enjoy the fish.

What’s new

bug fixes