NOTE: VocDroid has since been updated and is now available as Visions Of Chaos for Android. It is highly recommended you download the new version and ignore VocDroid.
I released an update to VocDroid today. It now has proper settings dialogs to fully customise the rules.
You can download the APK file here.
Getting to grips with Android has been an interesting learning process. I was going to setup a post or two about setting up the SDK and writing a basic app framework, but at this stage it would be the blind leading the blind. Once I get some more experience it is something I would like to do.