I turn to the Notes app on my iPhone all the time, whether it's to jot down ideas when there's no pen and paper handy, to make sure I've got a document I can access later via iCloud on my Mac or even ...

Instagram "Notes," the app's newest sharing feature, is a throwback to the good ol' days of AIM and MSN Messenger. No clue what Instagram Notes are? Let us explain. The feature, which launched on Dec.