I just tried this app, so far I have thrown a few things at it and it just tells me that it doesn't know what I mean. I will keep testing, great work so far. As for the UI, it is quite Siri'ish but I happen to like how Siri looks. But to avoid any legal issues I would suggest updating your UI so you can continue on with this app.
Oh and another feature I would suggest is adding it to the long press search button.
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