Interesting app.
It claims to do both NADIR (straight down) images as well as oblique images, which should allow capturing some details under overhangs.
I went to Altizure's website, but can't figure out their pricing for the "pro" features. Also, they seem to require a lot of info, in the name of "UAV verification". I'm not too keen on giving them the level of info they want, so right now, the 'cons' outweigh the 'pros' (for me).
I'll wait a bit and revisit this in a couple of months.