I have just added a Polytune clip-on tuner to my collection. So far I am convinced it is by far the best. It doesn't rattle like the Intelli, so I can leave it on while I play; it is faster than any of the others, some of which can be painfully slow; it hasn't broken yet, like the Snark did when I dropped it and it is probably the most accurate as far as I can judge.
It is probably the best tuner for a beginner as you can strum across all six strings and it will highlight any that are out of tune. The only thing I don't like about it is that it is a bit awkward to fit so that you can actually see the display.
I've suffered for my music. Now it's your turn... - Seasick Steve
Ana Espinosa 2014 Swiss spruce/IRW
Yulong Guo 2009 640mm scale cedar/IRW