There are three main options when tuning an instrument such as Ukulele. The absolute best option is using a clip on tuner. Free apps are available and will do the job with a bit of knowledge, and tuning by ear is very possible.
The 3 ways to tune your Ukulele are;
1 - Clip on tuner
2 - Use an app
3 - Tune by ear
Check out Andy's signature ukulele - Click the button below for more info!
Andy's Signature Ukulele