Tanksmith
Offline reef tank logbook
About
This app helps reef aquarium owners meticulously track water parameters, equipment maintenance, and livestock with photos. It offers detailed logging for water chemistry, test kits, and salt batches, with an optional pro version for advanced features like multi-tank management and PDF reporting.
What's New in Tanksmith
2.5.1
November 3, 2026
Dosing guidance is safer. Automatic mL/day estimates are now limited to liquid Red Sea Foundation A/B/C and its documented daily limits. Randy Recipe #1, BRS 2-Part, Aquaforest Component 1+/2+/3+, ESV B-Ionic and All-For-Reef show product guidance without an automatic mL estimate. Any displayed amount is an additional estimate above an unchanged routine, based on the measured net trend—not a total daily prescription. Confirm the exact preparation and actual water volume, and retest before dosing if you followed an earlier recommendation. Equipment tracking works. Add a skimmer, return pump, heater or RODI stage, set its service interval, swipe to mark it serviced, and edit or delete it. You can now delete a tank, a reading or an animal, and mark an animal as lost. A nitrate or phosphate result of zero saves instead of being refused, and changing the parameter in Log Reading no longer keeps the previous number. Generic target-band verdicts have been removed; trend charts remain. Edit a tank's name, water volume, type, setup date and notes without recreating its records. Empty, negative or malformed reading input is blocked; zero nutrient measurements remain supported.
MoreSubscriptions & In-App Purchases
$9.99
Tanksmith Pro
Unlimited tanks, readings & dosing analysis.
Developer apps
FAQ
Does Tanksmith have ads?
No, Tanksmith is ad-free. The app explicitly states 'no ads' in its description and is designed to provide an uninterrupted user experience for managing your reef tank.
What are the limitations of the free version of Tanksmith?
The free tier of Tanksmith includes one tank, a limit of 40 parameter readings, and three livestock entries per tank. Users can upgrade to Tanksmith Pro for unlimited entries and multiple tanks.
How does Tanksmith handle data privacy and offline functionality?
Tanksmith stores all tank records directly on your device, ensuring offline functionality and user privacy. Optional usage analytics are opt-in and exclude sensitive tank data.
Can I export my reef tank data from Tanksmith?
Yes, the Tanksmith Pro version allows you to create a Tank Report PDF. This report includes recent water parameter trends, livestock information, and equipment service status, which can be shared.
What kind of water parameters can I log in Tanksmith?
Tanksmith allows logging of numerous parameters including alkalinity, calcium, magnesium, nitrate, phosphate, salinity, temperature, pH, ORP, ammonia, and nitrite. It does not prescribe universal target ranges.
How often is Tanksmith updated?
The latest version of Tanksmith is 2.5.1, which was last updated on November 3, 2026. This indicates a relatively active development cycle for the application.
What devices is Tanksmith compatible with?
Tanksmith is designed for Apple devices and is compatible with both iPhone and iPad. It has an age rating of 4+.
What is the pricing for Tanksmith Pro?
Tanksmith Pro is available as a one-time purchase. This allows users to unlock advanced features such as managing multiple tanks, unlimited readings, and generating PDF reports without recurring subscription fees.
