Reef Book

Smart Aquarium Logbook

Take control of your water parameters. Log tests, spot trends, and keep every tank thriving. Whether you're maintaining a reef, planted tank, or any aquarium setup, Reef Book adapts to your needs.

See Reef Book In Action

Swipe through real app screens and explore the experience.

Everything You Need

Powerful features designed to make aquarium management effortless

30 Parameters

Track what matters with preferred units, color-coded ranges, and quick-entry presets.

Aquarium Hub

Keep reef, freshwater, planted, and quarantine setups organized in one workspace.

Easy Access

Pin the readings you check most so your daily routine takes seconds.

Trend Charts

See how your water changes over time and catch issues early.

Tags & Notes

Mark what happened and why so every reading tells the full story later.

iCloud Sync

Your logs stay up to date across iPhone, iPad, and Mac without any setup.

Pay Once

One purchase, every device. No subscriptions, no surprise paywalls.