Difference between Android 1.0 and Android 6

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 6 : Android 6 is the next version of Android after Android 5.1.1 which was introduced by Google. Key user features like USB Type-C support, fingerprint authentication support, better battery life with deep sleep, permissions dashboard, Android Pay and MIDI support were added in this version. Developer features like custom chrome tabs for better application browser support and application permissions management update were introduced in this version. Its version name is Marshmallow. The API level in Android 6 is 23. It was released on 05 October 2015.
Difference between Android 1.0 and Android 6 :

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.