Just wanted to say well done for the google app, I have just checked it out in the google play store, and it looks really good. Unfortunately I don't have an android phone so am wondering if you have any plans to have an app on any other platforms e.g. iOS for the iPhone/iPod/iPad or for Blackberry?
I have previously looked at the MyChoicePad software which is super cool in terms of its functionality, but is restricted to just iPads and obviously uses Makaton signs and symbols. I just wanted to say I think you have done the right thing by keeping it simple. A quick swipe on your phone, and you can be easily reminded of a sign you have forgotten rather than carrying the manuals around with you!
Will you be releasing any add on packs for further vocab in the future? Just as an idea, once you have paid for the software it would be nice to have the free monthly signs available as well?