This was not worth $2.99. Should have been $.99. Actually, a lite version first. Not as robust as I thought.

Pros: easy to use for addition of calcium and magnesium. Has brightwell as one of the supplement brands, which is nice.Cons: can't adjust unit of measurement for solid supplements, would be nice to have volumetric units. Why doesn't it have brands of alkalinity supplements?Overall it's good, but it falls a tad short of jdieck's web reef calculator we all know and love. With a few updates, this app could be awesome!

This is a pretty good app, it just needs to be more comprehensive. The qty to add is listed in grams for all of the additives I use. The problem with that though is that I premix my additives with RO water and thus the result in grams requires me to perform more calculations to get the result I need. Until this is changed it is not useful for me. This app could also have reminders for dosing as a useful function.

I really like the app but there are a some short falls that to me take it from a 5 to a 3.1) In Alklinity it only lists 3 items not names of products. The issue with this is some are more concentrated then others.2) it maxes desired dKh to 10 and I like higher3) Calcium was great.4) Magnesium was also too low. Maxes out at 1400Change the mag to higher max and add the brands for Alk and Ill change it to a 5