Add "messaging capabilities" to my Android application. - repost

Hello I have an android application (and also IOS and windows phone) which needs chat functionality (messaging) with push, i thought using [login to view URL] or ximpp ,i need someone experienced with implementing chat and messaging functionality, if you have extra android knowledge that's and [login to view URL] you have better solution then [login to view URL] i will be happy to hear. please download my app from [login to view URL] kind Regards Eran