iPhone users worldwide were sent in a spin after a video shared on Twitter went viral demonstrating a game-changing hack.
Stockholm student Jazz Johnson revealed a handy backspace function on the Apple calculator app, allowing users to swipe backwards to erase an incorrectly typed numeral, instead of starting over.
Jazz stumbled across the discovery on an old Reddit thread, then filmed herself demonstrating the little-known but time-saving function, then shared it to Twitter on Wednesday, The Sun reported.
"PSA: you can backspace on the iPhone calculator," she wrote.
The collective minds of Apple mobile phone users were blown after realising the basic feature could have saved them a lot of time retyping equations.
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Twitter users were stunned about the simple revelation.
“After all those times I had to clear the entire thing,” one user wrote.
“Im staring at my phone wondering what else I dont know bout this b***h,” tweeted another.
A third social media user wrote: “Why don't my college classes teach me this. Smh”
Samsung users are having the last laugh, with the Galaxy's backspace key having been clearly visible on the Android’s calculator app for years.