Just for fun, a few of us in our ukulele club bought a few different cheap rechargeable electronic clip-on tuners from Amazon to test and compare what they are like. All of these recharge via USB-C cables so you don't need spare batteries. There are some name brand tuners that appear to be identical to some of these (at least in the photos) and cost a little more. Here are our results:
1. "Wegrower" brand for $15. Has a big bright display for easy readability. Also best battery life. Accuracy is comparable to the cheaper Snark tuners. Amazon also sells a Fender-brand tuner that looks similar to this one for $20. https://www.amazon.com/gp/product/B089QRBZQ8
2. "Aroma" brand for $15. Smaller display than Wegrower, but still bright enough for easy readability. Smaller size and lighter weight makes it easier to store in a gig bag. Battery life isn't as good as Wegrower. Advertised as accurate to 0.5 cents, instead of the 1.0 cents that is typical of cheaper tuners (smaller number is more accurate). In practice it does appear to be more sensitive. https://www.amazon.com/gp/product/B0CXMF45RK
3. "Sound Harbor Store" brand for $10. We don't like the clunky design and feel of this tuner, but it is cheaper. https://www.amazon.com/gp/product/B0CRPD6Q3P
1. "Wegrower" brand for $15. Has a big bright display for easy readability. Also best battery life. Accuracy is comparable to the cheaper Snark tuners. Amazon also sells a Fender-brand tuner that looks similar to this one for $20. https://www.amazon.com/gp/product/B089QRBZQ8
2. "Aroma" brand for $15. Smaller display than Wegrower, but still bright enough for easy readability. Smaller size and lighter weight makes it easier to store in a gig bag. Battery life isn't as good as Wegrower. Advertised as accurate to 0.5 cents, instead of the 1.0 cents that is typical of cheaper tuners (smaller number is more accurate). In practice it does appear to be more sensitive. https://www.amazon.com/gp/product/B0CXMF45RK
3. "Sound Harbor Store" brand for $10. We don't like the clunky design and feel of this tuner, but it is cheaper. https://www.amazon.com/gp/product/B0CRPD6Q3P