What is the Difference Between Open Source Android Operating System (OS) Versions?

The difference between open source Android operating system (OS) versions lies in their features, proprietary components, and the level of support they receive from Google. Some key differences include:

1. Android Open Source Project (AOSP): This is the basic, open-source version of Android, which serves as the foundation for other Android variations. It does not include Google apps or the Google Play Store.
2. Pixel UI: This is sometimes referred to as "stock Android" and is the version of the operating system that runs on Google's Pixel phones. It includes additional features and improvements compared to AOSP.
3. Android One: This version of Android is essentially AOSP with Google Mobile Services (GMS) support. It is closer to stock Android than many other OEM skins, such as Samsung's One UI. Android One is designed for low-end phones and is maintained by Google, making it easier for smaller OEMs to manage software updates without significant resources.
4. Android Go: This is a lightweight version of Android designed for low-cost, entry-level devices with limited hardware capabilities. It includes a set of optimized apps and features tailored for these devices.
5. Custom OEM skins: Manufacturers like Samsung, LG, and HTC often apply their own custom interfaces and features on top of the AOSP or Android One, resulting in unique user experiences for their devices.

In addition to these differences, it is essential to note that the availability of updates to newer Android versions depends on the device's manufacturer and the level of support they provide. Some manufacturers, like Samsung, have the resources to maintain their custom skins and push updates to their devices, while smaller OEMs might rely on Android One for easier software maintenance.

Comparative Table: Open Source Android Operating System (OS) Versions

Here is a table comparing the differences between various open-source Android OS versions:

[Note: The NDK (Native Development Kit) release information is not available in the search results].

Each Android version provides compatibility for apps built using the APIs from previous platform versions, ensuring that apps remain compatible with future versions of Android while using the documented Android APIs.