I enjoyed fertility friend. I got the free trial then they gave me a half-price upgrade for the year.
By the end, I was basically just trying to DTD whenever we had the right kind of CM, so I don’t think it actually helped me to get pregnant, exactly, but it was always reassuring to see when I’d ovulated and to know that we’d DTD at the appropriate time.
It wasn’t 100% at predicting AF, but that’s because I have a variable luteal phase (which isn’t supposed to be a thing, but there you go). On the other hand, by the time I got to 15 days post-ovulation, I knew it was late, and the app did give me the data to do that!
Also, it was good to know my ovulation date when I did eventually get pregnant (we had fertility problems, and weren’t expecting to get pregnant naturally, which is why it took so long!). I ovulate quite early, so my estimated due date according to the midwife was a bit off. It’s been moved again thanks to the first scan, and baby would have had to have bent the space-time continuum to be conceived on that day, but AF would have been an even worse predictor for that date!
In summary, I couldn’t promise that fertility friend necessarily helped me to get pregnant in the end, but it did help me to feel a lot more in control, and to plan roughly when we’d be likely to want to DTD. I will be using it again next time I want to conceive, even if I have to pay full price.
(Oh, and I charted my BBT, of course, to give accurate post-hoc information about when I’d ovulated. I think that if I were throwing more money at the thing, I’d probably try ovusense, and see what that app is like. Next time I will hopefully have a small child who won’t necessarily make it easy for me to spend 10 minutes taking my temperature each morning, so ovusense might help with that. I don’t know if their app is as good as fertility friend, though.)