I use a LocOn . It has a wooden case and small enough to velcro it right on the guitar. Best feature is it is a chromatic tuner with an input jack. I can tune all my instruments, and with a piezolectric cord, can tune in the most adverse noisy conditions. It gets my highest recomendation. The intellatouch looks like it should do the job. Cost might give to the choice. Mine cost about $60.00 which was discounted by 10%.
Mudjack