PW-CT-26 Rechargable USB Tuner : Great for gigs

This tuner by D'Addario is very compact and lightweight. I like how it folds and turns into every possible angle. I own many (!) products by D'Addario and have never been disappointed by that brand. They just seem to make very good products.

As for the accuracy of the tuner I would say that it's very good. Then again, I use every tuner mainly to align my ukuleles with other instruments from the band. I believe, most instruments (guitars, ukuleles, etc.), no matter how poorly or well they are built, need to be tuned by ear in the end for best results. No tuner can replace the trained ear that knows the specific instrument and knows exactly which notes, overtones and harmonies need to align for the perfect tuning.