I bought an iDip to use with my iPhone6. I never have to worry about writing down my results. Very useful is how the time and date of each test is shown on the map as well as the location where I tested. I recently took the device on a trip to Philadelphia and tested the water in the pool before a swim. I haven't bought any additional tests which cost $4.99 each as the ones that come with the app are the most used. If you want reliable water quality results and want all the data stored on your phone to be reliable, this is a good device. Recommendations for improving the app include automatic connection for pairing and better navigation features, as well as instructions on how to test videos in the app.
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