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 7.1：
Android 7.1 是继 Google 推出的 Android 7.0 之后的下一个 Android 版本。此版本中添加了诸如白日梦虚拟现实模式、夜灯、存储管理器改进、触摸和显示管理性能改进以及启用指纹向下滑动手势的选项等关键用户功能。主要开发人员功能，如快捷方式管理器 API、支持圆形应用程序图标、键盘图像插入、VR 线程调度改进、增强的墙纸元数据、多端点呼叫支持、可视语音邮件的源类型支持以及管理视频电话的运营商配置选项都在此引入版本。它的版本名称是Nougat 。 Android 7.1 中的 API 级别为 25。它于 2016 年 10 月 4 日发布。
Android 1.0 和 Android 7.1 的区别：
| S.No. | ANDROID 1.0 | ANDROID 7.1 |
|---|---|---|
| 1. | It is the first version of Android. | It is the next version of Android after Android 7.0. |
| 2. | It is predecessor to Android 1.1. | It is predecessor to Android 7.1.1 and successor to Android 7.0. |
| 3. | It was released on 23 September 2008. | It was released on 04 October 2016. |
| 4. | The API level in Android 1.0 version is 1. | The API level in Android 7.1 version is 25. |
| 5. | It has 0 % android market share. | It has 7.8 % 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 ‘Nougat’. |
| 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 night light. | Night light was introduced in this version. |
| 10. | It did not have virtual reality. | Daydream virtual reality mode was added in this version. |
| 11. | It did not have developer features. | Various developer features like shortcut manager APIs etc. were added in this version. |