Help! Testing Issues with Parse both on iOS Device and in IONIC View on iPad

I am using Parse with Ionic for an iOS application. The App seems to work well in iOS Simulator and users can Sign In or Sign Up when run in Simulator and in Browser but when run on Device, it seems users can not Sign In or Sign Up. The App is also pushed on and when I tried from Ionic View app on iPad it gets past the Slash screen and loads the Sign in Screen but I can’t sign in.
It only shows progress and nothing happens. It seems console logs are absent so can not figure out what’s the issue?

My Environment
Ionic CLI version: 1.7.12
iPad 2 with iOS 9.2(13C75)
Xcode Version 7.2 (7C68)

Please let me know what am I doing wrong?