Ricochet
Explorer
Anyone knows how soon after release it will be available on the Kindle Fire? (Considering Amazon runs its own store not associated with Goggle Play).
If it's an Android app, you can simply sideload the app. Here's one of numerous articles about it (it's not too complicated, basically install it on a phone, back it up, and restore it onto the Kindle Fire. Alternatively, use a management program like ES File Explorer.. Transfer the install file over, run it on your Kindle Fire, and you're set).
http://www.howtogeek.com/178357/how-to-sideload-apps-onto-your-kindle-fire/