# Reef Book — Aquarium Parameter Tracker

> Aquarium Parameter Tracker (iPhone/iPad app by ReefSoft LLC.)

- Source: https://appshunter.io/ios/app/reef-book/id6740756140 (this page in markdown: same URL + `.md`)
- Developer: [ReefSoft LLC](https://appshunter.io/developer/1789068807)
- Category: Utilities, Reference
- Price: $5.99
- Age rating: 4+
- Requires: iOS 26.0 · 166 MB
- Languages: American English, French (France), German (Germany), Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan)
- Released: 2025-08-28
- Data updated: 2026-08-22
- User reviews in markdown: https://appshunter.io/ios/app/reef-book/id6740756140/reviews.md

## What is Reef Book?

Smart Logbook for Aquarists

Record a water test in seconds, see whether each reading is in range, and follow how your aquarium changes over time. Reef Book keeps every aquarium’s history together across iPhone, iPad, and Mac.

Set up each reef, planted tank, freshwater aquarium, or other aquatic system with the parameters you test, the units you use, and the ranges you want to maintain.

Record Without Friction

• Open Quick Record from the app, a widget, or a Shortcut
• Type an exact value or adjust it with a precision slider
• Keep repeated tests as separate readings instead of losing the individual results
• Mark frequently tested parameters as favorites for quicker access

Understand Your Results

• See which readings are within range and which need attention
• Follow changes across recent results or your complete history
• Use the activity heatmap to see when you tested and spot gaps
• Compare supported conversions directly from a logged reading
• Add notes and suggested tags for maintenance, dosing, livestock changes, and other events

Share and Stay in Sync

• Invite other aquarists to view or contribute to the same logbook
• Create a shareable summary, preview it, and choose what to include
• Keep every device up to date through iCloud
• Schedule automatic backups and choose how many to keep
• Use Reef Book without creating another account

Plus fun iMessage stickers!


## Version history (last 3 releases)

### 1.4 — 2026-08-15

Version 1.4 brings a brand new native interface to iPad and Mac.

• Open Quick Record from the app, a widget, or a Shortcut, then adjust the reading with a precision slider or type the value directly.
• Keep repeated tests as separate readings in an editable timeline.
• See when you tested with the new activity heatmap and updated trends.
• Write notes and get matching tag suggestions.
• Preview summaries and choose what to include before sharing.
• View supported conversions beside logged readings.
• Reorder aquariums and keep the same order across devices.

This update also improves editing, Quick Record saves, collaboration, backups, exports, accessibility, and error handling.Version 1.4 brings a completely new native interface to iPad and Mac.

• Open Quick Record from the app, a widget, or a Shortcut, then adjust the reading with a precision slider or type the value directly.
• Keep repeated tests as separate readings in an editable timeline.
• See when you tested with the new activity heatmap and updated trends.
• Write notes and get matching tag suggestions.
• Preview summaries and choose what to include before sharing.
• View supported conversions beside logged readings.
• Reorder aquariums and keep the same order across devices.

This update also improves editing, Quick Record saves, collaboration, backups, exports, accessibility, and error handling.

### 1.3 — 2026-07-30

Reef Book 1.3 makes aquarium care easier to share, understand, and maintain.

• Invite other aquarists to view or edit a shared aquarium logbook
• Enjoy a refreshed Liquid Glass design throughout the app
• Schedule automatic backups and choose how often they run and how many to keep
• Find owned and shared aquariums more easily with improved filters and status
• Bring existing Reef Book data into the new sync-ready system automatically
• Includes improvements to parameters, tags, translations, and reliability

### 1.0 — 2025-08-29

No release notes.

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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 2026-08-22.*