Log water tests for saltwater aquariums. Track KH, Ca, Mg, salinity, pH, temperature trends and spot reef swings early with automated insights.
Reef Buddy – Track Your Reef Tank With Confidence
Reef Buddy is the reef tracker and water test log built for saltwater tank and saltwater aquarium keepers. Log water tests, monitor parameter trends, and understand what is changing in your reef before small swings become real problems.
Track Every Essential Reef Parameter
Record KH, salinity, pH, Ca, Mg, NO₂, NO₃, PO₄, SiO₂, temperature, and more. Keep a clear aquarium log with visual trends for the values reef keepers watch most.
Smart Insights for Saltwater Aquariums
Get automated insights from your measurements so you can react earlier, keep your reef tank stable, and make better maintenance decisions.
Sync Across Devices
All your data is safely stored and automatically synced across your iPhone and iPad.
Manual Test Help
Enter results from your favorite test kits faster with guided steps designed for reef routines, regular water tests, and day-to-day reef journaling.
Unlock Premium with Shrimpy
Shrimpy, your reef assistant, unlocks powerful features:
• Expert analysis of your tank data
• Personalized advice
• Photo analysis of your aquarium
• Ability to ask questions and get reefing tips
Why Reef Keepers Choose Reef Buddy
• Built for reef tanks and saltwater aquariums
• Clean tracking without unnecessary clutter
• Compatible with major test kits, including Red Sea, Salifert, Hanna, and more
Subscription Info
Shrimpy Premium is available as a monthly or yearly subscription.
Payment will be charged to your iTunes account at confirmation of purchase.
Subscriptions auto-renew unless cancelled 24 hours before the end of the period.
Manage your subscription anytime in your Apple account settings.
Terms & Privacy Policy: https://reef-buddy.app
This is a great app! Looking for parameters for multiple aquariums this works. Would like a general section for notes per aquarium.
Developer Response
Thank you for your feedback and rating.Thank you for your suggestion; we will add it to a future version.
Awesome
ReefingwithReggie
Easy to track and use
Developer Response
Thank for you comment! Happy reefing!
Don’t do updates!
bonnnni
This was a great app until I updated it. Now it won’t recognize my log in info and there is no Forgot Password or anything else to help, I’ve lost all my tracking and now need to find an app that actually has support.
Developer Response
Hi,Thank you for taking the time to share this — I’m really sorry for the frustration this update caused you. Losing access to your account and your tracking data is absolutely not the experience we want you to have.There was no data deletion on our side with this update. In most cases, this issue is related to an authentication mismatch (email, sign-in method, or cached session after the update).Please contact us directly at contact@reef-buddy.app with the email address you used to create your account, and we’ll help you recover access as quickly as possible.We do provide support, and we’ll make sure you’re not left without a solution.Thanks again for your feedback — it helps us improve Reef Buddy for everyone.— The Reef Buddy team
Used to not require an account
Anonymous1567853
Was great but now requires an account to use. This is not an app that needs any of my information in order for me to track my parameters.
Developer Response
Thank you for your feedback. We understand that requiring an account may feel unnecessary for tracking aquarium parameters. The account system was introduced to enable secure data backup, multi-device sync, and future features like community sharing and personalized insights. That said, we genuinely value your privacy and are actively exploring ways to offer a local-only mode for users who prefer to keep everything offline. We appreciate your support and hope to continue improving Reef Buddy with your feedback in mind!— Shrimpy & the Reef Buddy team
Major performance improvements across the app for a smoother, more responsive experience.
Version 2.14.1
The developer, maxime marinel, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
Usage Data
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
