I've been using this app pretty much constantly, and I've only had one unexplained crash, but here's the specs in case it helps nail down the issue for others:
New iPad (16GB/WiFi Only)
Approx. 1000 tracks (only about 100 analyzed in app)
iTunes Match - No
When I run the app I close all other apps and put the device in Airplane mode. So far, (fingers crossed) that seems to be doing the trick