So I've been using ic opks for well over a year now and my usual brand was not available anymore. I had a wee Amazon scan and seen that Premom had pretty good reviews and offered a free app to go with their product. So you're supposed to take a pic of your opk and they rate it low, high and peak fertility by comparing the 2 lines and is supposed to chart for you along with bbt, cm etc. I just started using mine yesterday, got a low and today got a high but it's not charting anything? What am i doing wrong?? Any help would be grateful!!