 UC Browser is available as both an Android app and an iOS app, and is also available on several other older or discontinued mobile operating systems including BlackBerry OS, Symbian, and Windows Phone.While primarily a mobile app, UCWeb also offers a Microsoft Windows desktop version (there is no macOS version).The Android mobile operating system represents the largest user base for the company, which as of 2014 accounted for 300 million of its 500 million users.