1. Android 1.0：
Android 1.0是Google推出的第一个Android版本。它具有一些基本功能，包括Web浏览器支持，相机支持，Gmail帐户，Google地图和Youtube应用程序。尽管它没有正式的版本名称(如进一步介绍的版本)，但非官方地将其称为Apple Pie 。 Android 1.0版本中的API级别为1。在移动设备中不再使用它。它于2008年9月23日发布。
2. Android 4.4：
Android 4.4是Google推出的继Android 4.3之后的下一个Android版本。它具有以前版本的所有功能，并且在此版本中添加了各种新的用户和开发人员功能。在此版本中添加了关键的用户功能，例如屏幕录制，新的半透明系统UI，增强的通知访问权限，用于隐藏式字幕的系统范围设置。其版本名称为KitKat 。 Android 4.4中的API级别为19。该级别于2013年10月31日发布。
Android 1.0和Android 4.4之间的区别：
| S.No. | ANDROID 1.0 | ANDROID 4.4 |
|---|---|---|
| 1. | It is the first version of Android. | It is the next version of Android after Android 4.3. |
| 2. | It is predecessor to Android 1.1. | It is predecessor to Android 4.4.1 and successor to Android 4.3. |
| 3. | It was released on 23 September 2008. | It was released on 31 October 2013. |
| 4. | The API level in Android 1.0 version is 1. | The API level in Android 4.4 version is 19. |
| 5. | It has 0 % android market share. | It has 6.9 % android market share. |
| 6. | It does not have official version name. | It has official version name like its other previous versions. |
| 7. | It has unofficial version name ‘Apple Pie’. | It has official version name ‘KitKat’. |
| 8. | It had limited basic features like google maps, gmail, web browser, camera and youtube. | It had all features of previous versions and various new user and developer features were added in this version. |
| 9. | It did not have screen recording feature. | Screen recording feature was added in this version. |
| 10. | It did not have developer features. | Various developer features were added in this version like printing framework, full-screen immersive mode etc. |
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