If you are going to invest in a tuner you might as well buy one which
will last you for years without frustrating you.

I learned many years ago that buying cheap tools is a total waste of time and money, and a tuner is a tool, after all.

I would recommend as a minimum, the Korg AT-2 (mine cost around $65)
and steer clear of any tuner that doesn't have an actual needle, avoid the LCD gizmos like the plague.

Murray