Pretty cool app, thanks for putting it out there!
A few suggestions:
-Bromine! I use bromine in the indoor pools at our resort and would like to see that added to the chlorination methods, etc.
-Another vote for multiple pools/spas. I'm practically forced to use other apps until this is implemented, as I look after four.
-Bigger home screen buttons, but I figure you're probably waiting to get the mechanics where you want them before updating it cosmetically.
-On a couple of the other pool apps they've got an inventory feature (that usually isn't detailed enough), I'd love to see that implemented into this (with more chemicals)
-A table of results, like mfinta said a few posts back. This would be very handy to look at on the fly, as opposed to having to go through them individually or look at the graph. Until I looked on the FAQ on your website I didn't know you could even view past logs. Glad I found that.
-Under 'Advice', somehow include unit of measurement conversions. For example; "Add 16oz./1 pound of Calcium Chloride", or have a button to convert them if needed, as seen in another app.
-An added 'Pump Pressure' and 'Flow Rate' field on the 'Measure' screen would be great, reserving the note section for maintenance stuff, etc.
-Incorporate use of Sodium Thiosulfate to neutralize chlorine. It's rarely used chemical, but we've had to use it and I would like to have that added to the 'Adjust'/'Advice' sections.
-I wanted to see what it recommended if your TC was too high. I set my max in 'Defaults' to 5ppm and entered my test TC as 34ppm and it still stated that it was in acceptable range.
Other than that, this one's already better than the pay ones out there. Can't wait to play around with a new version!