'Apps' seem like self-contained units, vs. 'software' that might spread its muck all over your operating system. Apps tend to live in environments with a degree

'Apps' seem like self-contained units, vs. 'software' that might spread its muck all over your operating system. Apps tend to live in environments with a degree of enforced quality control. Or, in the case of web apps, are at least restricted in the damage they can inflict (see muck-spreading above). Software is a stuff. Who knows where one part ends and another begins? Applications are things. I have and use a discrete number of them. (Is this pertinent? I dunno, maybe.) Maybe all this is overthinking it. Apps are for phones and tablets, and those are easy. Software is for computers, and those are a pain.