Got your app for my android tab. It's really great. But first day I tried it I faced with error. While Lithuanian voices turned on, program just shut down when I got close to roundabout. In Lithuanian language it said word "roundabout" (žiedas) and then hanged and shut down, It could not say "take the third exit". With English voice it works great.
Also you could update it with newer, because that voice got a strange unpleasant accent :)