I love this app!

I love Lily! Its incredibly user friendly - graphs, charts and calendars are easy to read a follow; its also easy to enter and/or change previously entered data. I paid for the upgrade and it was $4.99 (I think), but compared to other fertility and cycle charting programs/software, Lily was a steal. Ive been using Lily for seven months now and love it; I highly recommend Lily and will happily continue using it myself!

Ashley Bowlin about Lily - Fertility Calculator