ReefDrift: Reef Parameter Log

Your test results are scattered. ReefDrift fixes that.

You test 1–3 times a week. Alk goes in Notes, calcium in a spreadsheet, pH you swear you'll remember. By the time you spot a drift, your SPS is stressed and your frag tank is showing it.

ReefDrift is a fast, offline-first reef parameter logger that tells you whether your tank is stable — the moment you save a test.

Free. No account. No cloud. No subscription.

LOG THE BIG THREE AND EVERYTHING ELSE

Alkalinity (dKH), Calcium, Magnesium — the parameters serious reefers obsess over. Plus Nitrate, Phosphate, pH, Salinity, Temperature, Ammonia, and Nitrite.

Last values pre-fill automatically. A full test set takes under 10 seconds.

TANK STABILITY SCORE

ReefDrift calculates a Stable / Watch / Danger score the instant you save a reading. 0.3 dKH drift shows up on your dashboard before you wonder why a frag is pale.

DOSING CALCULATOR — WIRED TO YOUR TANK

BRS 2-part · ESV B-Ionic · Red Sea Foundation · Aquaforest KH Coralline · Custom products

Enter your tank volume and current reading. Get the exact dose to hit your target. 100% offline.

TREND CHARTS WITH TARGET-RANGE BANDS

Every reading on a line chart with your target band overlaid. 7 days to 12 months time window.

HOME SCREEN WIDGET

Your last 3 parameters + next task on your Android home screen. Always-visible tank status without opening the app.

MAINTENANCE LOG

Record water changes, GFO/carbon swaps, ATO top-offs, and frag moves.

TEST REMINDERS THAT ACTUALLY FIRE

Uses exact-alarm API with battery-optimization onboarding. Fires within 60 seconds on Samsung, Xiaomi, and other aggressive battery devices. 100% free — never paywalled.

PRIVACY — YOUR DATA STAYS ON YOUR DEVICE

No account. No cloud. No login. All readings stored locally. CSV export is free, always.

FREE FOREVER ON ANDROID

Small banner ad on the dashboard only. No interstitials. No ads on entry screens or charts — ever.

Parameters: Alkalinity (dKH / meq·L / ppm) · Calcium · Magnesium · Nitrate · Phosphate · pH · Salinity (SG / ppt) · Temperature (°C / °F) · Ammonia · Nitrite

Recent changes:
Bug fixes and performance improvements.