For what it's worth, the HTML version works on mobile browsers (although on phones it can be a bit fiddly with the small screen size). Granted it's not an app as such, but you can run Decker itself as well as run published decks in this way on iOS and Android devices.
An Android port is about 90% there already; there are various #defines to stub out features that are unusable on Android. The last 10% is mostly annoying yet important details, like dealing with Android's very contorted model of application life cycle and restricted ability to traverse the filesystem vs. an ordinary OS. Feel free to tinker with your own fork.
So, i actually got it running without much work, thank you for the reply! SDL is actually very easy to deal with and it's all pretty well documented. Though, as you said, some details need an actual android specific version. I'll be looking into it for the next month or so (getting this running in a phone is actually a project i'm doing for college!), so i'll keep this thread updated. I'm not a C expert, so the code looks a little like too much for me XD, but i'm trying.