Never tried clip tuners. In the old days I had "not pedal" tuners. Y'know, battery only, not designed for your board. Have only ever owned two pedal tuners…
Boss TU3 is excellent, cheap second hand and as has been said would survive zombies, apocalypse etc. If it's a factor it's buffered bypass. The DC pass through is very useful. Plenty modes, high brightness function for outdoors.
Peterson Strobostomp HD. I got a bonus so bought a pedal that does sooo much more than I'll ever need. You can tune anything, any way you want to. And save it. And give that saved setting it's own colour. And customise it to the Nth degree. And make it cycle through only the tunings you use. I love being able to hit the + switch and cycle through BEADG, BEADG -1 semitone, guitar etc.
DC pass through, true bypass or buffered or…
"Buffered Bypass / Monitor Mode (Default). In this position, the output is driven exactly as in Buffered Bypass Mode but the tuner display remains active when un-muted to monitor tuning while playing."
Which is very cool, actually!
If I ever come across someone who needs their Bouzouki sorting for the tempered tuning of their choice, I'm their man
And it looks freaking GREAT.