ReefLog: Saltwater Aquarium

ReefLog is a clean, local-first reef tank tracker for saltwater aquarium keepers who want a faster way to log water tests, monitor trends, manage dosing and keep tank care organized.

Track the reef parameters that matter to your tank

Log alkalinity, calcium, magnesium, salinity, nitrate, phosphate, pH, temperature and more. Choose which parameters you want to track for each tank so your dashboard stays focused and clutter-free.

Fast reef parameter logging

Open Quick Log, pick a parameter and enter a reading in seconds. ReefLog keeps recent readings, target ranges and tank health status easy to see.

Dashboard at a glance

See tank health, recent readings, freshness status and maintenance progress from one clean dashboard. Tap any parameter to log a new reading quickly.

Trends and insights

Visual charts help you spot changes in reef parameters over time. Review weekly, monthly and long-term trends for your aquarium.

Dosing calculator and dosing history

Estimate safe dosing changes based on your tank volume and current readings. Keep a record of the doses you make so your reef care stays consistent.

Maintenance and reminders

Create maintenance tasks and test schedules for your reef tank. Optional local reminders help you stay on top of water testing and routine care.

Built for real reef tanks

ReefLog supports common reef aquarium workflows, including:

* Alkalinity, calcium and magnesium tracking
* Nitrate and phosphate monitoring
* Salinity, pH and temperature logs
* Test schedules and freshness status
* Dosing calculations and dosing history
* Maintenance tasks and reminders
* CSV export and local JSON backup
* Optional Cloud Backup with ReefLog Pro

Local-first and private

ReefLog works without an account for normal local use. Your reef data stays on your device unless you choose to use Cloud Backup. There are no ads and no analytics.

ReefLog Pro

Upgrade to ReefLog Pro to unlock:

* Unlimited reef tanks
* Advanced reef parameters
* Cloud Backup and Restore

Cloud Backup is a manual backup and restore feature, not live sync. Local backup and export remain available without Pro.

Who ReefLog is for

ReefLog is made for reef aquarium keepers, coral tank owners and saltwater hobbyists who want a simple, focused aquarium log instead of scattered notes or spreadsheets.

Track your reef. Spot trends early. Keep maintenance on schedule.

Recent changes:
What’s new in ReefLog 1.2
• New Saltwater / Fish Only tank type alongside Reef tanks
• New Care tab for maintenance, equipment and recurring tasks
• Improved reminders and notification reliability
• Log in °F, specific gravity, gallons and more
• Backdate and edit readings with improved long-term trends
• Better dosing records, bottle tracking and safety checks
• Improved Cloud Backup reliability and Pro status handling
• Many UX, stability and layout improvements