Aquarium Water Tracker - Reef
Water Tests, Livestock & Tanks
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Log every water test, track fish and coral, schedule dosing and maintenance. Reef turns your aquarium data into charts that catch problems early.
Stop guessing if your tank is healthy. Reef turns every water test into a clear picture of what your fish, coral, and invertebrates actually need. Log parameters, spot trends on charts, and catch problems before they cost you livestock.
Built for every setup, from a nano reef on a desk to a fish room with a dozen freshwater and saltwater tanks.
WATER PARAMETER TRACKING
- Log pH, ammonia, nitrite, nitrate, temperature, salinity, calcium, alkalinity, magnesium, phosphate, and more
- Color-coded indicators show green, yellow, or red so you see trouble at a glance
- Ammonia and nitrite are held to strict safety thresholds, so a toxic reading always shows red
- Trend charts over weeks, months, or years reveal slow drifts a single test hides
- Overlay maintenance events on charts to see how water changes and dosing affect your parameters
- Set custom ideal ranges for each tank type, whether reef, planted, or brackish
LIVESTOCK MANAGEMENT
- Track every fish, coral, invertebrate, and plant across all your tanks
- Record purchases, quarantine dates, and health observations
- Log losses with cause and date so patterns become visible
- Compatibility checker covering 32 popular freshwater and saltwater species
MAINTENANCE AND DOSING
- Schedule recurring reminders for water changes, filter cleaning, dosing routines, and equipment checks
- Log completed tasks with costs and notes
- Full maintenance history with cost tracking per tank and per month
- Swipe to mark tasks done right from the home screen
MULTI-TANK DASHBOARD
- Monitor every tank at a glance from one home screen
- Tanks that need attention appear first
- Recent activity feed across all tanks
FREE TIER
- 1 tank with up to 30 test logs
- Full parameter trend charts with complete history
- Full maintenance and livestock tracking
- Maintenance statistics and cost tracking
- Reminders for scheduled tasks
- Compatibility checker
PREMIUM UNLOCKS
- Unlimited tanks
- Unlimited test logs
- Unlimited maintenance schedules
Whether you keep a nano reef, a planted freshwater showcase, or a saltwater fish room, Reef keeps your parameters organized and your livestock thriving.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The compatibility checker is now where you can actually find it, and it reads correctly.
- The species compatibility checker is reachable from your tank list and from any tank's detail screen. It was previously unreachable.
- Fixed an "Incompatible" result that rendered invisible, so a warning could be missed entirely.
- Fixed five species pairs that could never be matched, so the checker returns a verdict where it previously came up empty.
- Ammonia and nitrite warning thresholds now flag genuinely unsafe readings sooner. Existing tanks are migrated automatically.
- Full dark mode support across every screen.
- Fixed a crash that could occur on launch.
- Species count in the description now reflects the real library.
Thank you for the reports that led to these fixes.
The developer, Karol Jaworski, 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 Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Karol Jaworski
- Size
- 3.6 MB
- Category
- Lifestyle
- 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
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Monthly $4.99
- Annual (Intro Offer) $39.99
- Annual $39.99
- Copyright
- © 2026 Karol Jaworski