I use a clip-on tuner on my guitar. I play a string. If the LCD display turns green, that string is in tune. Otherwise, it shows if it is too high or too low.
I saw someone else's tuner a few years ago. It would display the names of notes played to it. That person was using it to tune various instruments. If I remember correctly, I sang notes into that tuner and it would tell me what notes they were, not just the 6 guitar-strings notes, but any notes I could sing in a scale.
Those are two very different types of tuners. Do they have names? I would like to purchase one like the second one I described. I don't know what to ask for.
I am not certain if remember this correctly, so I would appreciate any help into identifying what I am talking about. Thank you!