The reference software for marine aquarists for all Apple Devices (iPhone, iPad and also Mac)

(You can of course also use AquaCalculator for documentation of any other aquarium)

  • Try AquaCalculator 2 weeks for free
  • Annual license for 9,99€ required after the testing phase
  • (Cancel your subscription anytime within your Apple AppStore Settings to avoid unnecessary costs)

Your AquaCalculator for Apple devices is valid for any number of your own Apple devices running either iOS, iPad-OS or Mac-OS.
If you want to use AquaCalculator also for Windows or Android devices you need another license!


AquaCalculator offers its own cloud solution that connects any number of Mac computers, iOS devices (iPhone/iPad), Windows computers and Android devices.
It stores your tank data, program settings, water values, documentation, animals and pictures.
Enter data on one device and use it on all others as well.
You have a new device and want to transfer the existing data? … no problem with aCloud!


  • Document your water values in graph and table form
  • Observe the development of your water values over time
  • Capture pictures and comments to document the development of your tank
  • Manage the most important data of your animals/ tank inhabitants
  • Save photos of your animals from your Mediathek or the devices built in camera
  • Use the built-in calendar with reminder function for work to be done

Salt concentration

  • Calculate the actual amount of salt needed for water changes or adjustment of the salinity of almost all available sea salt mixtures.
  • Tune the calcium, magnesium and alkalinity values of the sea salt mixtures you use with balling salts

Adjustment Calcium / Alkalinity / Magnesium

  • You are spoiled for choice!
    The wizard explains the different methods (2/3-part dosing (Balling method), lime reactor or lime water)
    including advantages/disadvantages and thus facilitates your choice.
  • Balling calculator with 2 calculation modes: “one-time adjustment” or “permanent adjustment”.
  • AquaCalculator calculates the exact dosing quantities and stock solutions for adjusting the calcium, alkalinity (KH) and magnesium concentrations
  • Whether from inexpensive salts or products of practically all aquaristic suppliers (over 100 integrated recipes)
    ATI, Aquafair, Aquaforest, Coral-Care, Fauna Marin, MicrobeLift, MT-Aquaristik, Nyos, H.W. Balling, Preis Aquaristik, A.Glaser, Red Sea, Sangokai, Tropic Marin.
    Also self-defined recipes are supported.


  • The nutrient assistant advises and supports you in solving possible nutrient problems.
  • Calculation module for “addition” or “reduction” of nitrate and phosphate

… and much more

  • Integrated Mini-FAQ – Common questions explained in a few words.
  • Convert measured variables of marine aquaristics (e.g. salinity ↔ density ↔ conductivity)
  • Manage your settings for target water values, water treatment, used technology etc.
  • The Tank Estimator helps you to estimate the actual water volume of your aquariums
  • Check your water tests against reference solutions to measure more accurately. Use the determined difference between “target/actual values” for future measurements of your aquarium water!