We have plans to provide an Android and iOS app in the future. We haven't chosen a slot for it on our roadmap and invite the community to help develop the applications. Let us know if you're interested in building something together!
We've had a couple of customers express interest in putting together an android app, I think if anyone starts building one and puts it up on github whoever else is interested in contributing can help out.
You can also check our UserVoice at: http://digitalocean.uservoice.com as there are a couple of threads there and you can stop by our chat room as well: