Other then learning to tune by ear quickly and accurately. An electronic tuner or clip-on tuner is a valuable asset to have around. Quick and east to use.
As a private guitar and ukulele teacher. I use an electronic tuner tuner to tune beginner students' out of tune instruments quickly in a lesson until they learn to do it their self or come in with the instrument in tune. You would be surprised as to the number of out of tune instruments students try and start their lesson with. I ask them when the last time they tuned their instrument and it is never today.
So any tuner that I have, and I have a few, gets a lot of real world use.
I buy and try out all the new ones on the market.
- Intellitouch Tuner
The Intellitouch Tuner was one of the first clip on tuners on the market.
I have one of their strobe clip one tuners. The most accurate clip-on tuners available.
- Planet Waves
One of the more durable clip on tuners available.
- Ko'olau Guitar and Ukulele - 'Ohau Chromatic Tuner
- Snark Tuners
- Sonic Research
(2012) - Seems every manufacture has a clip-on tuner available. Too many to keep on listing all the alternatives.
These are the ones that have been around the longest.
( from WidipediA: ) An electronic tuner is a device used by musicians to detect and display the pitch of notes played on musical instruments. The simplest tuners use LED lights or a needle to indicate approximately whether the pitch of the note played is lower, higher, or approximately equal to the desired pitch. More complex and expensive tuners indicate more precisely the difference between offered note and desired pitch. Tuners vary in size from units that can fit in a pocket to table-top models or 19" rack-mount units. The more complex and expensive units are used by instrument technicians, piano tuners and luthiers.