Zoom Am7

I trust Zoom, it is my go-to manufacturer for affordable, versatile, and decent equipment. This one is my last acquisition, it's super lightweight, and, matched with a smartphone, it fits one of the field-recordists' moto, "the best recorder is the one you can always have with you".
Sadly, when I plugged my headphones for monitoring, the app gave me the message "feature not available". Dudes, monitoring is not a "feature", it's basic functionality of a field recorder. Imagine a camera without a viewfinder/LCD screen: you don't know what you're looking at (or listening to, recording), and that's not something that the gain LEDs can compensate or help you with.
After some follow-up inquiry I found a list of compatible android OS's (super outdated, my two years old phone has succeeded the ones listed) on zoom's website.
So, I would suggest any prospecting buyers to check this list, or avoid buying the gadget in the first place. Unless zoom corp puts some effort to keep things up to date. A software update would be very much appreciated, and could turn this negative rating into a very positive one, on account of the aforementioned qualities and its price.