How to download Koo app on Android or iOS device How to download Koo app on Android or iOS device Learn how to download Koo app on your Android or iOS device in this step-by-step guide. advertisement UPDATED: February 18, 2021 17:07 IST Learn how to download Koo app on your Android or iOS device in this step by step guide. Koo came out to be one of the winners of a competition that was launched by the Union ministry of electronics and information technology in July 2020 in order to search for alternatives to Chinese apps. Koo had won the competition under the "social" category along with two other apps.