Yes, Anker is an official Apple certified brand,
While maintaining the same size as the original 5W charger, the Anker Nano has increased charging efficiency by three times, supports 20W strong output, and takes only 30 minutes to fully charge 50% of the iPhone 11, compared to more than 90 minutes for an ordinary 5V1A Apple charging plug to fully charge the same amount of power. In addition, the Anker Nano also supports iPhone8 and above models, as well as the upcoming iPhone 12 series.