For optimal performance on iPhone devices, using a relatively recent version of iOS for Kenyan mobile sports betting sites is generally recommended. While many betting apps and mobile sites can work on older versions, using iOS 11 or newer ensures better compatibility and security. Newer versions of iOS come with enhanced features and improved security protocols, which are crucial for online betting activities. However, its always good to check the specific requirements of each sports betting app or site, as some may need the latest updates for full functionality.