Meet Reef Meister, the aquarium app by Tony – A brand of Anton Paar. Measure salinity and pH, track water conditions, and keep your reef stable.
MEASURE SMARTER. TRACK WATER QUALITY. KEEP YOUR REEF STABLE.
Reef Meister makes it easy to measure, monitor, and manage water parameters in saltwater aquariums. Whether you're maintaining a reef tank, marine fish aquarium, or multiple tanks, track salinity, monitor pH, and keep your water measurements organized — all in one app.
Use EasyDens, SmartRef, or pH2Go with the app to collect reliable measurement data in one place. Use SmartRef to measure salinity and pH2Go to monitor pH.
No measuring device? You can also enter readings manually.
MONITOR SALINITY & PH
Stay on top of your aquarium water conditions and maintain a stable environment for your marine life.
- Measure salinity in PSU, parts per thousand (ppt), or specific gravity (SG)
- Monitor pH to support stable water conditions
- Check measurements against recommended ranges for your aquarium type
- Identify changes in water parameters before they become bigger problems
- Track salinity and pH readings over time
RESULTS WITH CONTEXT
Go beyond the measurement and understand what your results mean for your aquarium.
- See whether your salinity is within the recommended range for reef aquariums, typically around 35 ppt (approximately 1.026 SG)
- Get measurement guidance based on your aquarium type
- Identify salinity changes early to support stable conditions for corals, fish, and invertebrates
- Understand your measurements to make more informed aquarium maintenance decisions
MEASURE SMARTER, CALCULATE LESS
Spend less time calculating and more time caring for your aquarium.
- Capture precise salinity measurements with SmartRef using just a small sample
- Benefit from automatic temperature compensation without manual correction tables
- Switch between salinity units without manual conversions
- Calibrate SmartRef with distilled water directly in the app
- Measure salinity with digital refractometer precision for consistent, repeatable results
MANAGE TANKS & TRACK CHANGES
Keep your aquarium measurements organized and use previous results to monitor water quality over time.
- Create individual logs for multiple aquariums
- Track salinity and pH over time with measurement graphs
- Save measurements with notes and timestamps
- Add notes for water changes, top-offs, and dosing
- Compare measurements to identify trends
- Find previous measurements and logs with full-text search
- Copy or share individual measurement results
- Export your data as PDF or CSV
YOUR AQUARIUM DATA, ALL IN ONE PLACE
From individual salinity and pH measurements to complete tank histories, Reef Meister brings your aquarium data together in one place. Measure with connected devices, monitor water parameters, identify changes, and compare results to support stable conditions for your marine life.
With a free Meister Cloud account, sync your measurements and tank logs across compatible devices, including iPhone, iPad, Apple Watch, Apple Silicon Mac, Apple Vision Pro, and the web — one account for the entire Meister App family. Without a Meister Cloud account, your measurement data stays stored locally on your device.
Learn more: https://www.get-tony.com/
SUPPORT
Contact us at support@get-tony.com.
PRIVACY POLICY
https://www.get-tony.com/policies/privacy-policy
TERMS OF USE
https://www.get-tony.com/policies/legal-notice
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AUTO-RENEWABLE SUBSCRIPTION TERMS
Reef Meister is free to download, with optional monthly and annual subscriptions for advanced features.
Subscriptions automatically renew unless canceled at least 24 hours before the end of the current billing period. Payment and renewal pricing are displayed before purchase.
Subscriptions and free trials can be managed or canceled in your Apple Account settings. If a free trial is offered, the subscription renews at the displayed price unless canceled before the trial ends.
Ratings & Reviews
5.0
out of 5
2 Ratings
- Bug fixes and performance improvements.
- Added a new high-precision measurement mode
- Enhanced device settings
To improve our app for you, we regularly bring updates to the App Store. If you enjoy it, would you mind taking a moment to write a review on the App Store? We’d greatly appreciate it.
Version 6.8.1
The developer, Anton Paar ConsumerTec GmbH, 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:
Contact Info
User Content
Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Usage Data
Diagnostics
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
Anton Paar ConsumerTec GmbH
Size
75.9 MB
Category
Reference
Compatibility
Requires iOS 18.0 or later.
iPhone Requires iOS 18.0 or later.
Mac Requires macOS 13.3 or later and a Mac with Apple M1 chip or later.
