# ReefLog: Water Parameters

> ReefLog: Water Parameters (iPhone/iPad app by Aditya Wirayudha.)

- Source: https://appshunter.io/ios/app/reeflog-water-parameters/id6760807815 (this page in markdown: same URL + `.md`)
- Developer: [Aditya Wirayudha](https://appshunter.io/developer/830166045)
- Category: Utilities
- Price: $4.99
- Age rating: 4+
- Requires: iOS 17.0 · 4 MB
- Languages: English
- Released: 2026-03-26
- Data updated: 2026-07-09
- User reviews in markdown: https://appshunter.io/ios/app/reeflog-water-parameters/id6760807815/reviews.md

## What is ReefLog?

Your reef tank's chemistry tells a story. ReefLog helps you read it.

Track alkalinity, calcium, magnesium, and 10 more parameters with beautiful trend graphs, target range indicators, and instant status dashboards. Built exclusively for saltwater reef aquariums -- not freshwater, not ponds, not general "aquarium management."

No subscription. No account required. No ads. Pay once, own it forever.

--- LOG WATER TESTS IN SECONDS ---

Tap, enter your numbers, done. ReefLog is designed for speed because you're logging parameters at your tank, not sitting at a desk. Every parameter a reef keeper tracks is built in with the correct units:

  - Alkalinity (dKH, meq/L, ppm CaCO3)
  - Calcium (ppm)
  - Magnesium (ppm)
  - Salinity (ppt, SG, PSU)
  - pH
  - Temperature (F / C)
  - Nitrate (ppm)
  - Phosphate (ppm, ppb)
  - Ammonia, Nitrite, Potassium, Strontium, Iodine

--- SEE TRENDS BEFORE PROBLEMS START ---

Beautiful trend graphs show your parameter history with ideal target ranges highlighted. See at a glance whether your alkalinity is drifting, whether your calcium consumption is increasing, or whether that new dosing schedule is actually working. Compare multiple parameters on a single chart to spot correlations.

Spot problems before your coral does.

--- DASHBOARD WITH STATUS AT A GLANCE ---

Every parameter displays a color-coded status indicator -- green when in range, yellow when drifting, red when out of range. Mini sparkline graphs on every card show recent trends without opening a single chart. Know your tank's health the moment you open the app.

--- TRACK EVERY TANK YOU RUN ---

Display tank, frag tank, quarantine tank -- each one gets its own dashboard, its own history, its own target ranges, its own trend lines. Support for up to 10 tanks. Switch between them instantly with a single tap.

--- YOUR DATA, YOUR DEVICE ---

No account required. No login screens. No server dependency. Your data lives on your device. You will never lose years of parameter history because of a server outage or a broken password reset.

Export to CSV anytime -- your data is always yours. Perfect for hobbyists who also maintain spreadsheets or want to run their own analysis.

--- BUILT BY A REEFER, FOR REEFERS ---

ReefLog speaks your language. Alk in dKH or meq/L. Calcium in ppm. Salinity in ppt or specific gravity. Target ranges based on proven reef chemistry, not generic aquarium values. Customizable ranges per tank because your SPS-dominant display has different targets than your quarantine tank.

Set test reminders so you never miss a weekly alk check. Dark mode that looks great at 11pm when you're doing your evening tank check.

--- WHAT MAKES REEFLOG DIFFERENT ---

  - Reef-specific from day one (not a general aquarium app)
  - Modern, native iOS design (not a 2012 UI)
  - Local-first data storage (no account, no data loss)
  - Focused on parameters (does one thing exceptionally well)
  - One-time purchase (no subscription fatigue)
  - Active developer who actually responds to feedback

--- DESIGNED FOR SERIOUS REEF KEEPERS ---

If you're testing alk, calcium, and magnesium every week -- and then writing the numbers on a sticky note or burying them in a spreadsheet -- you already know you need a better system.

ReefLog is the tool you've been looking for.

One-time purchase. No subscription. No ads. No account required.
Your reef deserves better than a spreadsheet.


## Version history (last 1 release)

### 1.0 — 2026-03-26

No release notes.

## More apps by Aditya Wirayudha

- [Rocket Adventure](https://appshunter.io/ios/app/rocket-adventure/id830166042)
- [WireCalc - Wire Sizing](https://appshunter.io/ios/app/wirecalc-wire-sizing/id6760633176)
- [EV kWh Calculator - Charge](https://appshunter.io/ios/app/ev-kwh-calculator-charge/id6760639014)
- [Hue - Color Identifier](https://appshunter.io/ios/app/hue-color-identifier/id6760641600)
- [Expose — Exposure Calculator](https://appshunter.io/ios/app/expose-exposure-calculator/id6760650330)
- [Fuel - Gas Mileage Tracker](https://appshunter.io/ios/app/fuel-gas-mileage-tracker/id6760706393)

All apps by Aditya Wirayudha: https://appshunter.io/developer/830166045

## Related topics

[parameters](https://appshunter.io/ios/topics/parameters)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-09.*