PoolCalc

This is just a half assed preview that has zero features. Waste of time

Junk. What good is this?

While I agree the ads get in the way, and the slider is useless, you can manually enter data using the keyboard, and the ability to calculate quickly on my phone is very valuable. Considering its free, I like it a lot

This app is very buggy. The ad bar keeps jumping up and blocking important information on the screen. Can't view or edit the values. Worthless app. Not sure how anyone would "upgrade" to pro when the free version is so bad. Fix defects and try again :-)

I find the sliders used to enter data difficult to use. Something more like the interface Apple uses for the built-in apps or even just text boxes would be preferable. I also might prefer more precision for some parameters (pH) and maybe less for others (CH). Also, the TDS input maxes out too low for pools using liquid chlorine (Although TDS is not such a major factor in the calculation anyway - some calculators omit it entirely).

When you're trying to set some of the parameters, the slider never gives you the exact number, it keeps jumping around like crazy. This app does have some potential, if you fix this problem I believe that it would be useful, right now it's mostly frustrating.