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Here is another iPhone App to check out. App is called 'Pool Smart' and provides an overview of water basics and provides a checklist of the tests you need to do and in what order. The app performs all the calculations for pool volume, along with amount of chemicals needed to add. Everything you need in one place !
This guy is not a regular spammer -- he's just the developer or marketer of the app. There's no evidence on his website that he knows anything about pools, but he's obviously willing to violate user agreements in order to promote his product.
You might want to consider this, and whether you can trust him with your pool chemistry, BEFORE you buy his app!
Here are identical posts on Havuz
https://lh3.googleusercontent.com/-S...0/havuz-sm.jpg
and PoolCenter
https://lh4.googleusercontent.com/-5...lcenter-sm.jpg