Well worth it!

It takes a few days to figure this out, but once I did, I found it to be the most comprehensive app if its type!

The graphics are beautiful and as far as accuracy goes, we shall have to see ;) More information included with the app (such as a demo video) would be great for first timers, but all the info can be found online! Thanks!

Chellabella49 about Lily - Fertility Calculator, v1.0.5