That should fall under fair use. As long as youΓÇÖre not trying to represent the app in an official standpoint, you should be totally fine to use it.
i think some companies might try the ΓÇ£copyrightΓÇ¥ route to prevent you using their logo if itΓÇÖs a NEGATIVE review... but I donΓÇÖt know where that would actually sit legally. But for small scale reviews of an app I see no issue using it, and most app developers would appreciate the free advertising.