I can't use TextSecure on my new Android device because it's not available on the Amazon App Store - it's only available on Play. The people I communicate with

I can't use TextSecure on my new Android device because it's not available on the Amazon App Store - it's only available on Play. The people I communicate with are on iOS where there's no TextSecure client. But the bit I dislike about TextSecure and whatsapp is that it's based on a phone number bound to the contactlist of your Google Play Android phone. I see a very strong movement towards kik messenger among my peers because usernames are so easy to deal with and share around in semi-public places.