App Crashed Phone

While inputting some b-days, the app froze the phone. I had to reset. Tried to use app again and it crashed my phone and I had to restore it. I am very disappointted by this app. I paid $5 to restore my phone. What I did see while using this app was ok and worth about 3 stars but the crash sent my rating to 1 star.

yo_2phone about iDay Deluxe