It’s been just over three months since Instagram copied Snapchat stories and slapped them on top of its feed. The move appears to be a success: within a few weeks, 100 million people were using the feature every day. (Snapchat’s entire app gets 150 million users a day.) Instagram stories are almost identical to the Snapchat version, but they have an extremely useful extra feature: you can rewind them by tapping on the left side of the story. Well today it’s Snapchat’s turn to copy: you can now rewind stories just as you can on Instagram.

The feature is part of an update to Snapchat that also includes “world lenses,” the rear-facing camera version of the app’s famous selfie filters. And like most updates to Snapchat, the feature is…

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