The phrase references a specific iteration of a communication platform application on the Android operating system. More specifically, it indicates compatibility, or a lack thereof, with devices running a significantly older version of the Android OS, version 4.4, also known as KitKat. This operating system was initially released in 2013.
The importance of this compatibility stems from the ongoing need to support older hardware. While modern applications are typically designed for newer operating systems and more powerful devices, a segment of users may still rely on older phones or tablets. Discontinued support for older Android versions impacts these users’ ability to access the communication platform, potentially isolating them from communities and information.