Reef Tank Log: Water Tracker

Reef Tank Log is the water parameter tracker built for reef keepers who run more than one tank. ◆ Multi-Tank Management — the core ・Create a profile for every tank: name, volume, and type (SPS / LPS / mixed) ・Switch the active tank in one tap — the current tank is always visible in the header ・Overlay the same parameter across tanks on a single comparison chart (Pro) ◆ 8 Water Parameters — logged your way ・Alkalinity (dKH), calcium, magnesium, nitrate, phosphate, salinity, temperature, pH ・Log only what you tested — no field is mandatory, matching real testing routines ・Soft warnings catch obvious typos without ever blocking a save ◆ Trend Charts — catch the drift before the crash ・Every entry feeds an automatic time-series chart per parameter ・Range bands show where readings sit against tank-type presets ・"In range / out of range" at a glance right after saving, and on the home summary ◆ Dosing Log (Pro) ・Record additive brand, amount, unit, and date with quick suggestions ・Doses appear on the same timeline as your parameter charts, so you can see what moved the numbers ◆ Export (Pro) ・CSV / PDF export of any tank's full history ◆ Private by design ・All data stays on your device — no account, no sign-up 【Pro】(in-app purchase — auto-renewing subscription or one-time Lifetime unlock) Pro unlocks unlimited tanks, full-history trends, the tank comparison view, the dosing log, and CSV/PDF export. Plans: monthly or yearly, or a one-time Lifetime purchase that keeps Pro forever. Payment is charged to your Google Play account. Monthly and yearly plans renew automatically until cancelled. Manage or cancel them anytime in your Google Play subscription settings. Lifetime is a one-time payment with no auto-renewal. Free plan: 1 tank, unlimited parameter logging, and the last 30 days of trend history. Privacy Policy: https://hecuhecu.github.io/apps/reef-tank-log/privacy/ Terms of Use: https://hecuhecu.github.io/apps/reef-tank-log/terms/ Legal Notice: https://hecuhecu.github.io/apps/reef-tank-log/tokushoho/