Our life has no end in just the way in which our visual field has no limits.
have blog :: will travel
This chromatic tuner is sensitive (it can get an accurate reading from a quiet sound) and robust (when a note is being played, it is not easily distracted by extraneous sounds). With some tuners you have to be careful about exactly how you play the note. With this tuner, such care should not be necessary. The ability of the tuner to hear notes even against a background of ambient noise does mean that when there is ambient noise with no note being played, the tuner will tend to pick random notes out of the ambience from moment to moment. So in this situation the tuner will randomly wander around, imagining notes. I deliberately kept it this way since if it was less sensitive then it would be less able to detect notes which are being played.

You say you don't like Equal Temperament tunings? No problem, just do as the author does and remember the cents offset you want for that tone; except at the very low end, the readings are accurate to a fraction of a cent all the way to 20kHz.
And if you'd rather a tuner that plays reference notes out loud, not to worry, they have that too: the Seventh String Tuning Fork. (and yes, there's a metronome too)