By late 2025, it had reached over 5 million downloads on the Google Play Store . What is a ".rar" File?
It allows users to share opinions ("Koos"), follow others, and use hashtags .
If you see "RAR" associated with a download, it refers to a specific file format . Download - Koo APK for Android
Koo is an Indian microblogging platform designed as an alternative to Twitter . Launched in 2020 by Aprameya Radhakrishna and Mayank Bidawatka, it gained fame for supporting multiple regional Indian languages like Hindi, Kannada, Tamil, and Telugu .