I definitely have mixed feelings about these tests. Love the convenience of at home testing, however there are definitely some flaws. 1) taking a pic of your strip was extremely hard for me- the app kept rejecting my pics over and over, took an obscene amount of attempts almost every time. 2) the protocol for pdg increase was a little too rigid for my personal results. For example, the protocol for successful ovulation was that pdg should rise on days 6-10 DPO, and mine rose on days 10-13, so therefore my results showed up as less than optimal on their scale. 3) there was one day that was test results were obviously completely an error, didn’t make any sense. I was actually pregnant but the results told me my LH was 50 and my pdg was 0. The next day everything resulted in normal range again. Helpful tool for sure, but use with some caution.