We have made a test version of Voice4u for the Android. Both the English and Japanese versions will be available for use. Just like Voice4u for the iPhone, this version consists of 150 pre-existing icons, as well as the ability to create your own.

At this time we are making preparations in order to offer this trail app for FREE. As soon as we have arranged everything, will will let you know via our blog and Twitter (@sv4u).
Here is a demo video if you are interested.