The icon shows a square shaped loop that is made up of two arrows moving in a counter clockwise direction. This would represent a repeating of a cycle or the current operation.
This is a Repeat icon. We've made it in iOS style
, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 13,700 icons, all in the same style and quality.