Hey guys I wonder if there are any Android or iOS libra coin apps that could be downloaded for testing in the testnet? Thanks!

Need to create an iOS app that would implement client-side Bitcoin Wallet. In Android, we would use BitcoinJ library. Is there any library for iOS similar to BitcoinJ? Objective-C or Swift? Thanks!

I am trying to rewrite an app that I originally developed for iOS. I was going to develop a native Android version but then decided it would be better to use this opportunity and try using Xamarin.Forms. Doing it one Page at a time, now I'm stuck with the Page where I need to get the screen's width and height. Does anyone know the equivalent of iOS' View.Frame.Width in Xamarin.Forms?