This is a Last 6 Hours Filled 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 12,800 icons, all in the same style and quality.
A circle with dots inside the circle. The dots are on the inside circumference of the circle. The dots are all around the inside of the circle. There is an arrow pointed left in the top right of the circle. There is the number six in the center of the circle.