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 & Sync (Pro)
・CSV / PDF export of any tank's full history
・iCloud sync keeps every device up to date via your Apple ID

◆ Private by design
・All data stays on your device — no account, no sign-up
・Optional iCloud sync (Pro) uses only your Apple ID. No new account, ever

【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, CSV/PDF export, and iCloud sync.
Plans: monthly or yearly (the yearly plan includes a 7-day free trial), or a one-time Lifetime purchase that keeps Pro forever. Payment is charged to your Apple ID account. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period; manage or cancel anytime in your Apple ID subscription settings. The Lifetime unlock is a single 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/
EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Legal Notice: https://hecuhecu.github.io/apps/reef-tank-log/tokushoho/