Reef Meister: Measure & Manage

Keep your reef rock-steady with Reef Meister. Measure salinity in seconds and hold your tank in the sweet spot your corals, fish, and invertebrates depend on.

Connect your SmartRef refractometer over Bluetooth and read salinity accurately from a tiny sample — or add readings by hand. No device yet? You can still log, organize, and export measurements, then connect one whenever you're ready.

RESULTS WITH CONTEXT Pick how you like to read it and Reef Meister tells you what your number means:

• Salinity in PSU, parts per thousand (ppt), or specific gravity (SG)
• See whether your tank sits in the reef-safe range — around 35 ppt (1.025 SG)
• Catch drift early and correct it before your livestock feels the change

ACCURATE & REPEATABLE

• Refractometer precision from a tiny sample — far steadier than swing-arm hydrometers
• Automatic temperature compensation — values are already corrected, no tables needed
• Calibrate with distilled water right in the app for confidence in every reading

A HISTORY YOU OWN

• Track salinity over time, tank by tank, with notes and timestamps
• Add per-reading notes for water changes, top-offs, and dosing
• Find anything instantly with full-text search
• Export to PDF for clean reports or CSV for spreadsheets
• Long-press any result to copy or share it

ONE ACCOUNT, EVERY DEVICE A free Meister Cloud account syncs your logs across iPhone, iPad, Apple Watch, Apple Silicon Mac, Apple Vision Pro, and the web — one account for the whole Meister app family. Without an account, your data stays local on your device.

For refractive index and salinity you need a SmartRef refractometer by Anton Paar. 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 https://www.get-tony.com/policies/legal-notice

Auto-Renewable Subscription Terms:

Subscriptions are billed monthly or annually at the rate selected depending on the subscription plan.

The price corresponds to the same price segment, which is set in the "Apple's App Store Matrix" for other currencies.

• Your free trial subscription will automatically renew to a paid subscription unless auto-renew is turned off at least 24 hours before the end of the free trial period.

• Please note: any unused portion of a free trial period (if offered) will be forfeited when you purchase a premium subscription during the free trial period.

• You can cancel a free trial or subscription anytime by turning off auto-renewal through your iTunes account settings. This must be done 24 hours before the end of a free trial or subscription period to avoid being charged. The cancellation will take effect the day after the last day of the current subscription period, and you will be downgraded to the free service.

• Account will be charged for renewal within 24-hours before the end of the current period, and identify the cost of the renewal.