In order to get the android alternative on there, someone has to do the work to get it on there in the first place. If no one has done it for your device, then

In order to get the android alternative on there, someone has to do the work to get it on there in the first place. If no one has done it for your device, then that job falls to you. Which is why most of these target Nexus devices, because those are the easiest to do the work for (or it's already done).