Yes! Its a pretty good measure of how much Ive come to depend on this app, that I was biting my nails for the few days that it was out of service after the OS 4.0 upgrade.
I love the always-there convenience of having a Strobostomp built into in my iPhone. Other tuners pale in comparison, both in terms of accuracy and ease of use.
I do a lot of instrument setups, and Ive never found any non-Peterson pedal or rack tuner that is accurate enough for setting intonation. I can hear the difference, and so can many of my friends and customers.
Scooternut about iStroboSoft