Hi, cycle 3 of trying and thus far I've been using glow to track my stats, this month I have brought in fertility friend too just out of interest to see how things compare. Due to a disagreement between the two I have a possible 12 day fertile window this month (hoping the thermometer will step in and adjudicate on this). Anyway, I prefer glow as I find it far more user friendly but I get the impression that ff is the app of choice for most people, also my instincts tell me that the window ff is predicting seems more likely despite glow having more data to work with. Just wondered about other people's experience, what do you like to use and why and do you have a sense of which has been the most accurate?