I'm not sure if you're the right person but someone on Reddit who appeared to be from the Polarr team was promoting and gave me a free copy of the Mac app. I wrote up a ton of feedback and PM'ed it but didn't get a response. I have a feeling the account wasn't actively monitored (it was called "polarr_throwaway"), is there somewhere better to send such things?

Also I think Polarr is fantastic! It's incredible what you guys can do with a little bit of JS. If you had library/organisation features I think I could ditch Lightroom/Capture One entirely. I wish you open sourced some of your stuff, I'd even add the features I want myself.

Picky also looks extremely promising. Does it do duplicate detection of some sort? That alone is a huge problem I have with LR and C1Pro. I spend a ton of time just picking out the least blurry from a series of photos that are otherwise exactly the same.