This Xvive PT-05 guitar pedal tuner is a great little pedal that doesn’t put too big of a dent in your wallet. I was very surprised at how quickly it hears and displays the notes as I play them. I have had other more expensive pedals that have had a greater latency. The tune is accurate and has options to change the reference frequency other than 440hz. It also has a flat function for those that don’t play guitar in standard tunings. The size is perfect for a small pedal board where real estate is an issue. I don’t think anyone could go wrong with this pedal if they need a small, accurate, inexpensive tuner pedal.
https://www.amazon.com/gp/product/B01J58K27I/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1