Pool Math funktioniert nicht

By following these calculations the pool owner achieves and maintains crystal clear water without reliance on the often unproductive advice and unneeded expense from pool stores. • Your subscription will be charged to your iTunes account at confirmation of purchase and will automatically renew (at the duration of 1 year) unless auto-renew is turned off at least 24 hours before the end of the current period. • Current subscription may not be cancelled during the active subscription period; however, you can manage your subscription and/or turn off auto-renewal by visiting your iTunes Account Settings after purchase.  diese App makes swimming pool care, maintenance and management easy by tracking chlorine, pH, alkalinity and other levels to help calculate how much salt, bleach and other chemicals to add.  Pool Math performs all the calculations you need to keep your chlorine, pH, calcium, alkalinity, and stabilizer levels balanced.  Crystal clear algae free pool water is what Trouble Free Pool Math is committed to.  Trouble Free Pool believes using a proper test kit is much easier, effective, and economical in the long run.  Other apps claim to make testing easy by using test strips and your phone's camera.  Keep swimming in your TroubleFreePool with Pool Math.  Test strips are notoriously inaccurate and end up costing you much more money in both chemicals and the tests themselves in the long run.  Unfortunately, this is simply too good to be true.