AquaCalculator

AquaCalculator

aquarium app for aquarists

12 ratings
9 reviews
Free
In-App Purchases

Details

  • Released
  • Updated

Features

AquaCalculator screenshot #1 for iPhone
AquaCalculator screenshot #2 for iPhone
AquaCalculator screenshot #3 for iPhone
AquaCalculator screenshot #4 for iPhone
AquaCalculator screenshot #5 for iPhone
AquaCalculator screenshot #6 for iPhone
AquaCalculator screenshot #7 for iPhone
AquaCalculator screenshot #8 for iPhone
AquaCalculator screenshot #9 for iPhone
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About

This app helps dedicated marine aquarists manage and document their aquariums. It tracks water parameters, manages animal stock, and calculates precise salt and nutrient additions. It also offers tools for adjusting calcium, alkalinity, and magnesium levels.

Manage multiple aquariums
Water value documentation with graphs and tables
Animal administration with notes and pictures
Recurrent memory for care tasks
Salt quantity estimation
Nutrient and chemical adjustment calculators
Extensive setting options
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What's New in AquaCalculator

2026.6.8

June 16, 2026

Water parameter configurations are now synchronised via aCloud.

Subscription plans

AquaCalculator yearly

AquaCalculator functions for one year

$19.991 Year
14 Days trial
How to cancel AquaCalculator subscription ⁉️
5

In-App Purchases

$3.99

A large coffee

Stay awake!

User reviews

Pricy for not much

I like supporting apps but this is just a little bit overboard. Too many apps want too much cash. Asking a small yearly fee is fine 5 bucks maybe but otherwise…it isn’t worth it. Good luck

Not usable

All the app does is display a series of panels advertising what the app does. You can’t exit that advertising. The app is not usable.

Great app

Amazing

Nice app great features poor execution

It’s clearly not an English app as not all strings have been localised. The UX is convoluted and confusing. To add a tank for example there is no onboarding instead you need visit “Master data” and add the tank and then in the main interface you can to work out how to select it. I feel the developers are clearly very smart as the functionality and science is clearly good but the app is very hard to use and understand. It’s also very buggy, I ended up on screens with no way to cancel or get out, had one screen where the navigation title overlapped the cancel button so again I couldn’t get out. The tap areas for some of the input parameters are tiny. I feel that with a decent understanding of HIG and more use friendly UI this would be a top class app for marine aquarists.
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Paid

$14 for a notepad?

Response from developer

I am sorry that you are not happy or not in need of the featureset of the AquaCalculator. But AquaCalculator is way way more than a notepad. Please refer to the Apps decryption or our website to get an overview of what AquaCalculator has to offer to ease you day to day routine as an aquarist.

Developer apps

FAQ

What is AquaCalculator?

AquaCalculator is a reference software designed for dedicated marine and freshwater aquarists. It helps users document and manage all important parameters related to their aquarium's care, including water values, animal stock, and chemical adjustments.

How does AquaCalculator's subscription work?

AquaCalculator offers a two-week free trial period. After the trial, a paid subscription is required for permanent use. Subscriptions can be stopped at any time before they become chargeable. Monthly and yearly plans are available.

What are the subscription costs for AquaCalculator?

AquaCalculator offers a monthly subscription for $3.99 with a 3-day free trial, and a yearly subscription for $19.99 with a 14-day free trial. These prices enable full access and regular updates.

Can AquaCalculator be used for freshwater aquariums?

Yes, while the main focus is on saltwater aquariums, freshwater pools can also be documented and managed effectively using AquaCalculator.

Does AquaCalculator have ads?

No, AquaCalculator does not contain advertisements. The app is ad-free, allowing for an uninterrupted user experience focused on aquarium management.

What kind of calculations can AquaCalculator perform?

AquaCalculator can perform realistic estimations for required salt quantities from various commercial sea salt mixtures. It also calculates exact dosing quantities for adjusting calcium, alkalinity (KH), and magnesium using low-cost salts.

What devices does AquaCalculator support?

AquaCalculator is supported on Mac, iPhone, iPad, and Apple's reality devices, providing a versatile platform for aquarists to manage their tanks.

How often is AquaCalculator updated?

AquaCalculator was last updated on June 16, 2026, with version 2026.6.8. Subscribers benefit from regular updates and enhancements to the software.