Alternatively, a permission might be listed in the app manifest as required (as opposed to optional) and app would not install unless user grants the permission; user can withdraw any, even required, permission from any app in the device settings after app installation, but few users do this. The source code has been used to develop variants of Android on a range of other electronics, such as Android has been the best-selling OS worldwide on smartphones since 2011 and on tablets since 2013.

In July 2012, "mobile subscribers aged 13+" in the United States using Android were up to 52%,Android devices account for more than half of smartphone sales in most markets, including the US, while "only in Japan was Apple on top" (September–November 2013 numbers).In the second quarter of 2014, Android's share of the global smartphone shipment market was 84.7%, a new record.Despite its success on smartphones, initially Android tablet adoption was slow.Despite app support in its infancy, a considerable number of Android tablets, like the This began to change in 2012, with the release of the affordable As of the end of 2013, over 191.6 million Android tablets had sold in three years since 2011.According to StatCounter's web use statistics, as of August 15, 2017In general, paid Android applications can easily be In 2010, Google released a tool for validating authorized purchases for use within apps, but developers complained that this was insufficient and trivial to In December 2015, Google announced that the next major release of Android (On October 16, 2018, Google announced that it would change its distribution model for Google Mobile Services in the EU, since part of its revenues streams for Android which came through use of Google Search and Chrome were now prohibited by the EU's ruling. Furthermore, Google announced a new "target API level requirement" (Only the base Android operating system (including some applications) is open-source software, whereas most Android devices ship with a substantial amount of proprietary software, such as Google licenses their Google Mobile Services software, along with the Android trademarks, only to hardware manufacturers for devices that meet Google's compatibility standards specified in the Android Compatibility Program document.In 2014, Google also began to require that all Android devices which license the Google Mobile Services software display a prominent "Powered by Android" logo on their boot screens.Some stock applications and components in AOSP code that were formerly used by earlier versions of Android, such as Search, Music, Calendar, and the location API, were Members of the Open Handset Alliance, which include the majority of Android OEMs, are also contractually forbidden from producing Android devices based on forks of the OS;Android received a lukewarm reaction when it was unveiled in 2007. Google promised to work with developers and create exceptions if their apps require Phone or SMS permissions for "core app functionality".

The device codename is available to running applications under The documents revealed a further effort by the intelligence agencies to intercept Google Maps searches and queries submitted from Android and other smartphones to collect location information in bulk.Leaked documents published by WikiLeaks, codenamed In August 2015, Google announced that devices in the In a March 2017 post on Google's Security Blog, Android security leads Adrian Ludwig and Mel Miller wrote that "More than 735 million devices from 200+ manufacturers received a platform security update in 2016" and that "Our carrier and hardware partners helped expand deployment of these updates, releasing updates for over half of the top 50 devices worldwide in the last quarter of 2016".

This status bar can be "pulled" down to reveal a notification screen where apps display important information or updates.An All Apps screen lists all installed applications, with the ability for users to drag an app from the list onto the home screen.

While the core Android system remains free, OEMs in Europe would be required to purchase a paid license to the core suite of Google applications, such as Gmail, Google Maps and the Google Play Store. A Recents screen lets users switch between recently used apps.