ReefLog vs Reef Stability

Log your reef in 30 seconds. Never lose a reading again. ReefLog is a water parameter tracker built for saltwater and reef tank keepers. Faster than a spreadsheet, smarter than a paper notebook. WHY REEFLOG - 30-second logging: A quick-entry sheet tuned to your test kits. Tap in your numbers and get back to enjoying your tank. - Unlimited everything: Unlimited tanks, unlimited tests, unlimited history. No monthly measurement caps, no extra fee for a second tank. - Trends you can actually read: Clean charts with safe-range bands, so a slow alkalinity drift stands out weeks before your corals show it. - Reliable reminders: Test-day notifications that fit your schedule, so consistency stops depending on memory. TRACK WHAT MATTERS Alkalinity (dKH), Calcium, Magnesium, Nitrate, Phosphate, Salinity, Temperature, and pH. Input fields match your test kit's units and precision. MADE FOR YOUR TANK Tell ReefLog what you keep - SPS, LPS, soft corals, or fish-only - and it applies matching target ranges. SPS keepers get the strictest profile; fish-only tanks get sensible, forgiving bands. YOUR DATA, YOUR CONTROL - All records are stored on your device - No account required - Import from CSV (moving from a spreadsheet or another app) - Export your full history to CSV anytime - Attach photos to track coral growth and coloration MULTI-TANK READY Keep a display tank, a frag tank, and a quarantine tank? Switch between them instantly. Every tank gets its own log, charts, and target ranges. PRICING ReefLog is a paid app. One price unlocks every feature - choose weekly, annual, or lifetime. Subscriptions auto-renew and can be managed or canceled anytime in your store account settings. Questions or feedback: support@reeflog.app Terms of Use: https://exultant-tail-74b.notion.site/ReefLog-Terms-of-Use-39f02c4ed12280f1b0b9fe068de0bdfe Privacy Policy: https://exultant-tail-74b.notion.site/ReefLog-PrivacyPolicy-39f02c4ed122808d9f2ad836b1f7d7fd

Reef Stability turns your own test results into the two things every reef keeper actually needs: how much to dose, and when to leave the tank alone. Log your alkalinity, calcium, magnesium and nutrients, and Reef Stability learns how fast your tank uses each one. Then it works out the daily dose to hold it steady — from your data, not a generic chart. When a wobble is just test-kit noise, it says so, instead of sending you chasing a number. WHAT IT DOES - Know what to change — a daily dose from your own tank's measured uptake - Stability first — it tells you when to do nothing - Every parameter on one clean screen: alkalinity, calcium, magnesium, nitrate, phosphate, salinity, temperature, pH - Trends that filter out test-kit scatter, so you see real drift - Safe by design — dose changes stay within reef-safe daily limits, with extra caution for SPS - Honest by design — sourced chemistry, and it never invents a number it can't stand behind - Your data is yours — full history and CSV export, free, forever - No account, no sign-up — your logs stay on your device FREE Log, track and export everything — free, with no time limit. REEF STABILITY PREMIUM Unlocks the dose recommendations, supplement forecasting and cross-parameter interpretation. Available monthly, annually, or as a one-time lifetime purchase. Stability over chasing numbers. --- Privacy Policy: https://reefstability.com/privacy Terms of Use: https://reefstability.com/terms Subscriptions are billed to your Apple ID. An auto-renewing subscription renews unless cancelled at least 24 hours before the end of the current period; manage or cancel anytime in your App Store account settings. A lifetime purchase is a one-time payment.