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When Android is installed on devices, ability to modify the otherwise FOSS software is usually restricted, either by not providing the corresponding source code or preventing reinstallation through technical measures, rendering the installed version proprietary. The core components are taken from the Android Open Source Project (AOSP), which is free and open-source software (FOSS) primarily licensed under the Apache License. Most versions of Android are proprietary. It was unveiled in November 2007, with the first commercial Android device, the HTC Dream, being launched in September 2008. Android is developed by a consortium of developers known as the Open Handset Alliance and commercially sponsored by Google. GNU GPL v2 for the Linux kernel modificationsĪndroid is a mobile operating system based on a modified version of the Linux kernel and other open-source software, designed primarily for touchscreen mobile devices such as smartphones and tablets.Apache License 2.0 for userspace software.Open App, or Applications or Manage apps, or something similar.

The exact steps may vary slightly from one brand of Android phone to the next and by the operating system version. So, force close the app and run it again. Force Close the AppĪn app may not open because it never actually closed in the first place. However, for some apps, like games or self-contained utilities, which don’t require a connection to web services, installing an old version from an APK file is possible.Ĭheck out How To Install Android Apps Using The APK File and 5 Best Safe APK Download Sites for Android Apps for detailed information. These services are usually intended to work with only the latest version of the software. It’s uncommon for older versions of an app to remain compatible with the latest web services provided by the app maker. This is only viable if the app in question doesn’t rely on web services to work. You can usually find the APK file for older versions of that app on sites like APK mirror.