MTuner

This tuner, like rest of software from Melda is not really free. Its adware. It annoys you with red banner asking for 30 USD. Also screen UI resizing and antialiasing is disabled.

Tuner can do basic mono and poly tuning. Authors are quite optimistic about poly tuning - they have in configuration space for 8 note polyphony. In reality poly tuner has problems even with 2 bass sounds.

Basic tuner has high accuracy mode but because it displays just 1 decimal digit in Hz, I can't cross check it with other free tuner GTune and my KORG tuner. You can configure stabilisation time - 100ms by default.

Included is also volume meter. It takes too much space on the screen and its not clear what kind of measurement is used - so pretty much useless, we have good meters in DAW already.

UI is not nice at all, it is using Accordion for configuration. Why not tabs? It takes so much screen space just for tuner.

Verdict: UNINSTALL