Difference between Android 1.0 and Android 8.1

1. Android 1.0 :
Android 1.0 is the very first version of Android which was introduced by Google. It had some basic features including web browser support, camera support, Gmail accounts, Google maps and Youtube application. Although it does not have the official version name like further introduces versions but unofficially it is called Apple Pie. The API level in Android 1.0 version is 1. It is not used anymore in the mobile devices. It was released on 23 September 2008.

2. Android 8.1 :
Android 8.1 is the next version of Android after Android 8.0 which was introduced by Google. Key user features like show battery level in quick settings for devices connected via bluetooth, navigation buttons dim when not in use, UI updates to power off and restart, automatic light and dark themes and emoji updates were added in this version. Key developer features like neural networks API for artificial intelligence, shared memory API, wallpaper colors API, programmatic safe browsing actions and autofill framework updates were introduced in this version. Its version name is Oreo. The API level in Android 8.1 is 27. It was released on 05 December 2017.

Difference between Android 1.0 and Android 8.1 :

S.No.	ANDROID 1.0	ANDROID 8.1
1.	It is the first version of Android.	It is the next version of Android after Android 8.0.
2.	It is predecessor to Android 1.1.	It is predecessor to Android 9 and successor to Android 8.0.
3.	It was released on 23 September 2008.	It was released on 05 December 2017.
4.	The API level in Android 1.0 version is 1.	The API level in Android 8.1 version is 27.
5.	It has 0 % android market share.	It has 15.4 % 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 ‘Oreo’.
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 UI updates for power off and restart.	UI updates for power off and restart were added in this version.
10.	It did not have automatic light and dark themes.	Automatic light and dark themes were introduced in this version.
11.	It did not have developer features.	Developer features like various APIs were introduced in this version.