1. 安卓 1.0：
Android 1.0 是 Google 推出的第一个 Android 版本。它有一些基本功能，包括网络浏览器支持、相机支持、Gmail 帐户、谷歌地图和 Youtube 应用程序。虽然它没有像进一步介绍版本那样的正式版本名称，但非正式地称为Apple Pie 。 Android 1.0 版本的 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. 安卓 6：
Android 6 是继 Google 推出的 Android 5.1.1 之后的下一个 Android 版本。此版本中添加了关键用户功能，如 USB Type-C 支持、指纹认证支持、深度睡眠更好的电池寿命、权限仪表板、Android Pay 和 MIDI 支持。此版本中引入了诸如自定义 chrome 选项卡以提供更好的应用程序浏览器支持和应用程序权限管理更新等开发人员功能。它的版本名称是Marshmallow 。 Android 6 中的 API 级别为 23。它于 2015 年 10 月 5 日发布。
Android 1.0 和 Android 6 的区别：
| S.No. | ANDROID 1.0 | ANDROID 6 |
|---|---|---|
| 1. | It is the first version of Android. | It is the next version of Android after Android 5.1.1. |
| 2. | It is predecessor to Android 1.1. | It is predecessor to Android 6.0.1 and successor to Android 5.1.1. |
| 3. | It was released on 23 September 2008. | It was released on 05 October 2015. |
| 4. | The API level in Android 1.0 version is 1. | The API level in Android 6 version is 23. |
| 5. | It has 0 % android market share. | It has 16.9 % 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 ‘Marshmallow’. |
| 8. | It had limited basic features like google maps, gmail, web browser, camera and youtube. | It had all features of previous versions and some new user and developer features were added in this version. |
| 9. | It did not have fingerprint authentication support. | Fingerprint authentication was introduced in this version. |
| 10. | It did not have Android Pay. | Android Pay feature was added in this version. |
| 11. | It did not have developer features. | Developer features like better application browser support was added in this version. |