I initially loved this app in early labour. The big button and clean display were perfect. I also liked how my phone didnt lock when the app was open - I didnt have to worry about putting my password in every time I wanted to start/stop contraction. However, it calculates the intervals wrong! The interval between contractions should be calculated from the start of one to the start of the next, not from the end of one to the start of the next (as this app does). Good interface but needs adjustment of how it calculates data. I didnt have any need to email data, but people might be annoyed to find they have to pay to email (or you can just take a screenshot and send for free!).