Claims to be free but not useful until you pay – Touch DJ™ Evolution - Visual Mixing, Key Lock, AutoSync Review

Like others have indicated, mostly useless until you pay. Nag screen on launch to pay...well, that's when the launch doesn't crash. Developer complains to everyone through notification when he gets a bad review and blames the customer rather than working on improving the product.
Review by USTechnovangelist on Touch DJ™ Evolution - Visual Mixing, Key Lock, AutoSync.