Fish Tank Tracker vs GPSRecTracker

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 (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 — 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 — and no ads - Gallons or liters for each tank, °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 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

GPS Receiver is a lightweight GPS flight tracking tool for pilots, aviation enthusiasts, and users who need a clear view of real-time GPS data. View your current speed, altitude, heading, coordinates, GPS accuracy, and recorded flight path in a focused dashboard. Record flights in the background, save offline reference map areas, review past routes, and replay your track with a cockpit-style view after landing. Offline maps are designed for basic reference use. They use low-zoom Natural Earth data and may be overzoomed when enlarged, so they are not high-detail aviation charts or official navigation data. Key features: Real-time GPS speed, altitude, heading, and coordinates Flight recording with track history Background location recording while tracking GPS quality and accuracy alerts Offline reference map areas Flight records and route review Cockpit-style replay view English interface support Natural Earth attribution for offline map data GPS Receiver is intended as a supplemental situational awareness and flight logging tool. It should not be used as the sole source of navigation, terrain avoidance, weather decisions, or flight safety information. Always use approved aviation instruments, charts, and procedures.