I would like to know if movie box affect the security vulnerabilities of iOS 8.1?

Guys I am frequent user of show box for android once I heard it was available for iOS in form of movie box I naturally downloaded it note my iPad is not jail broken the team that created the app told me to change some dates then click a download link this prompted an install and the app got installed now that weird app,e doesn't allow any third part download but this thing got downloaded Dafaq happened? I checked the app for streaming it streams movies fine ,but now my problem is I want to know will this app be able to steal my personal information I usually use my iPad for credit card payment since its a safe platform I just want to know if I am safe using this app link:http://installmoviebox.com

Update -movie box stopped streaming as of yesterday don't know why as this is a common problem als more predominant in its sister app Show box for android ,still it heighten my fear that I am being scammed some one please reply fast

Twitter link-https://mobile.twitter.com/moviebox_app