ReefLog: Reef Tank Tracker
Ca · Alk · Mg · Water Changes
Only for iPhone
$4.99 · Designed for iPhone. Not verified for macOS.
iPhone
The reef tank journal your corals deserve. Track Ca, Alk, Mg + all 8 parameters. One tap to log. Offline forever. No subscription.
Track your reef tank's critical parameters and never lose a coral to preventable parameter swings.
ReefLog is built specifically for reef and saltwater aquariums — not generic fish tanks. Log calcium, alkalinity, magnesium, phosphate, nitrate, salinity, pH, and temperature in seconds. Your entire tank history in one place, always offline.
WHAT MAKES REEFLOG DIFFERENT
• Designed for reef chemistry — the Ca/Alk/Mg triad is front and center
• Instant health indicator — green/yellow/red based on your actual values vs. safe ranges
• Multiple tanks — manage a display tank, frag tank, and sump separately
• Water change log — never forget when you last changed water
• Coral inventory — track what you have, what it cost, and how it's doing
• 100% offline — no account, no subscription, no cloud required
WHO IT'S FOR
Hobbyist or advanced reefer running a mixed reef, SPS, LPS, or FOWLR tank. If you've ever killed a coral because you forgot to test alkalinity, this app is for you.
PRIVACY
ReefLog stores all data locally on your device. Nothing is sent to any server.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, 磊磊 张, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 磊磊 张
- Size
- 1.4 MB
- Category
- Sports
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
French and 6 more
- French, German, Japanese, Korean, Portuguese, Simplified Chinese, Traditional Chinese
- Age Rating
4+
- 4+
- Copyright
- © 2026 Leilei Zhang
