Whilst .co is rising in popularity (and Godaddy are starting to throw their weight behind it), I'd still avoid using it mainly because consumers are so used to

Whilst .co is rising in popularity (and Godaddy are starting to throw their weight behind it), I'd still avoid using it mainly because consumers are so used to the .com extension. However, if you really want the .co extension then you could purchase all 3 suggestions you mentioned above - XXX.co, getXXX.com and XXXapp.com and then redirect the other 2 domains to one of them (most likely being getXXX.com)