Not working on ipad

I love the idea of this app but it is not working for me on my ipad. I dont have an iphone or other smart phone and was hoping it would work on my ipad instead. I have other iphone apps that I use without a problem. I can type in my email and password but it doesnt allow me to log into the app. Please fix!!

KTS4 about Prayer App to Help you to Pray and Ask for Prayers