It claims to analyze why your baby is crying. Could be annoyed, hungry, sleepy or even bored. The Cry Baby Analyzer has a big LCD screen with a bunch of smiley faces that correspond with those emotions/states, so you can quickly see what’s going on.
Now no telling if this works or not, but for a pretty low price, you could test it out.
(Please note prices are subject to change and the listed price is correct to the best of our knowledge at the time of posting)