ReefDiary - Aquarium Log
Test. Dose. Thrive.
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Track reef tank water parameters, dosing, coral trends, and routines offline. Built for saltwater aquarium stability with no account, cloud sync, or ads.
Log saltwater aquarium parameters, spot stability drift, calculate dosing amounts, and keep reef care decisions grounded in your own data.
KEY FEATURES:
- Log Ca, Alk, Mg, pH, Salinity, Temp, NO3, PO4 in seconds
- 2-part dosing calculator (BRS, ESV, Tropic Marin, custom)
- Color-coded parameter cards show instant health status
- Trend charts reveal drift, recovery, and repeat patterns
- Exportable reports for second opinions, store visits, or support threads
- Multiple tank support with separate histories and routines
BUILT FOR REEF KEEPERS:
- No account required, no cloud sync; reef data stays local
- Works offline - practical for fish rooms and maintenance benches
- Dense, scannable interface designed for daily reef checks
PRO FEATURES (monthly, yearly, or lifetime):
- Unlimited tanks and full long-range parameter history
- Advanced dosing products and custom formulas
- CSV exports and shareable reef detail images
- Custom testing cadence and dosing follow-through
Free to download. Pro unlocks the long view: full history, reports, formulas, routines, and unlimited reef systems.
LEGAL:
- Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
- Privacy Policy: https://peachuinc.github.io/legal/reefdiary/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
New in this update:
- Added Lifetime Pro alongside monthly and yearly plans.
- Added a Settings privacy control for anonymous usage analytics; reef tank names, readings, notes, dosing amounts, exports, emails, and identifiers are never sent.
- Improved the Rate on App Store and support flow, including clearer TestFlight feedback handling.
- Refined purchase, restore, paywall, privacy, and localization details.
The developer, Petr Persianov, 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 Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Location
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Petr Persianov
- Size
- 9.2 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 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
English and 6 more
- English, Dutch, French, German, Japanese, Portuguese, Spanish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- ReefTrack Pro – Monthly $7.99
- ReefTrack Pro – Weekly $2.99
- ReefTrack Pro – Yearly $29.99
- Copyright
- © 2026 Petr Persianov