Short version: Please submit your Android doit.im app to Amazon so that it becomes available on the Kindle. Although the Kindle is not my main device, I often read on it, and it would be great to update my todos directly on the Kindle instead of looking for my phone.

Longer: One of the really nice things about doit.im is that there are native clients for every device. Please consider submitting your existing android app to the Amazon store. This is the only (simple) way I know of to get it onto the Kindle.

As an app developer, I've done this myself, and Amazon make it pretty easy and I've had minimal hassle (definitely simpler than iOS, though marginally more tedious than Play).

Also, in my experience, the Amazon store gets a lot of downloads. Often more than Play, so it could be great for the app! Thanks!