It may be a beleaguered handset maker, but BlackBerry's doing all it can to make its apps and services remain in demand, and on Monday it announced a new free update to its messaging app for all smartphone users. The new features being added to BBM are of the mistake eradication kind and are therefore the type many Gmail users wished they'd had access to on April 1. The BBM tweaks mean that whether on a BlackBerry, Android or iOS device, a message or image can be ‘retracted' if sent in error and, like in Snapchat, make a missive ephemeral, setting a time limit on its existence.



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