I’m a fan of guitar (and ukulele) tuners that use vibration help you to zero in on the right note for each string. Here’s a new one from Planet Waves that looks like it might be pretty nice. It has a narrow LCD display that shows the currently tuned note for the string that you’re trying to tune. As you tighten or loosen the string, the display will turn from Red to Green when you have successfully tuned the string to the correct note. My current fave tuner is the Intelli IMT-500, but I’d like to try this one. You can find it on Amazon for about $25.