Reef Tally: Aquarium Log

Francis Irele

In-app purchases

About this app

Reef Tally is the reef tank log for keepers who measure: log the water parameters on every tank — salinity, dKH (alkalinity), calcium, magnesium, nitrate, phosphate, pH and temperature — and watch each one's trend against your own target range, offline, on your phone.

WATER PARAMETERS, LOGGED IN SECONDS
Tap a tank, type the numbers your test kit just gave you, and press save. Temperature, salinity, pH, alkalinity (dKH), calcium, magnesium, nitrate and phosphate each carry their own unit — °C, SG, ppm, dKH — so the reading you enter is the reading your test kit printed. Test twice in a day and log twice; nothing is capped.

YOUR TANK'S OWN TARGET RANGE
Every parameter takes a range you set — the band your tank actually runs at — and each reading is judged against it: in band, drifting, or out of band. Green, amber, red. It is arithmetic you can inspect, not a black box, and it works with no signal, no account and no server.

THE TREND, WHICH IS THE POINT
Log a parameter twice and the line begins. Reef Tally draws each parameter's history against your band, so you can watch drift develop over the week instead of discovering it in a coral loss. Lead with one parameter, plot any other, and switch tanks to compare. Pro opens the trend layer.

UNLIMITED, AND FREE WHERE IT MATTERS
Unlimited tanks. Unlimited parameters. Unlimited entries, forever. The whole log is free, along with CSV and JSON export — take the entire record with you whenever you like. Pro is the trend charts, the across-tank analytics and the range nudges: one purchase, no subscription, and no part of your log is ever held back.

PRIVATE BY DESIGN
No account. No sign-up. No analytics. No ads. No cloud sync. Reef Tally works fully offline, and your readings never leave your phone unless you export them yourself. A reading here is typed, never sensed — the app asks for no camera, no location and no sensors.

WHY REEF KEEPERS CHOOSE REEF TALLY
· No subscription — one-time purchase, yours for good
· No account, and nothing to sign up for
· No ads, and no analytics watching your tank
· Unlimited tanks and readings on one purchase
· Your data stays on your phone, and exports on your terms
· The core loop — log a reading, see the verdict — is never gated

Bring your test kit results into one place and let the line do the remembering. Reef Tally: Aquarium Log.

What’s new

Reef Tally 1.0
- Log temperature, salinity, pH and dKH against your own bands
- Every reading gets an instant in-band, drifting or out-of-band verdict
- Trend charts and multi-tank history with Pro
- Export your log to CSV or JSON, always free
No account. No ads. Your data stays on your device.