Simple app does what it says. Free Version:

I downloaded the free version and MIXTRAX does exactly what it says. Once started it analyzes songs on your device. I had to restart the analysis after an error, after that It reportedly was able to analyze 1604 out of 1862 songs on my iPhone and created three Mixes to choose from, "Beat, "Chill", and "Thump". Ive only listened to the Beat Mix so far and it provides OK transitions (better than 2 sec of silence, ill take it). Simple and Works for what I wanted. I have a Pioneer receiver that doesnt have/support MIXTRAX on it BUT Im able to connect my iphone to my cars USB and play it that way. Not having to skip a bunch of songs or spend the time to make a consistent playlist, the app does it for me. From the previous reviews Im lucky it found most of my music, perhaps everyones contributions before me beefed up Pioneers server content. Next Ill be getting the paid version, downloading this to my Macbook Pro and doing my entire library. Just got a call while the app was running and it would be great if the music picked back up afterwards.

nrdonln about MIXTRAX Lite