I've done a bunch of MV88 recording (with the lightning adapter) - and have found it to be a pretty solid recorder. Much better than I'd have expected (though, as with anything, expectations are crucial).
I've recorded stuff from all over, in terms of placement. On the rail of a balcony, in a shirt pocket, taped to a post. It's pretty much set it and forget it. I did have it lose connection once, but generally with reasonable handling it's never been an issue. Can't speak to the USB-C version though.
Might check this out, though I bought a lightning phone to use for just recording a few years back...so no real need to upgrade.