Android is an open platform that's freely available to you as an app developer. You can immediately download the Android SDK, develop apps, and distribute them to the world without any registration or fees.
Android is developed by Google Inc. and the Open Handset Alliance. We've made it available to you as a development platform pursuant to our commitment to openness, freedom, and innovation in mobile.
To start developing apps for Android, download the free Android SDK.
The "Android" name, the logo, and other trademarks are property of Google Inc. You may not use the logo or the logo's custom typeface.
You may use the word "Android" in a product name only as a descriptor, such as "for Android" and the first instance should be followed by a TM symbol, "for Android™." In other messaging, the word "Android" may be used in text as a descriptor, as long as it is followed by a proper generic term (for example, "Android™ application"). Any use of the Android name must include footer attribution in your communications: "Android is a trademark of Google Inc."
The Android Robot logo can be used, reproduced, and modified freely in marketing communications. Our standard color value for print is PMS 376C. Our online hex color is #A4C639. The Android Robot logo is licensed under the terms of the Creative Commons Attribution license and any use of it must be attributed as such.
For more information about Android brands, see the Brand Guidelines.
All other trademarks are the property of their respective owners.
We are pleased to license the Android documentation and sample code on this web site under terms that encourage you to take, modify, reuse, re-purpose, and remix the content as you see fit. The documentation content on this web site is made available to you as part of the Android Open Source Project. This documentation, including any code shown in it, is licensed under the Apache 2.0 license. All other content on this site, except the license documents themselves and as otherwise noted, is licensed under the Creative Commons Attribution 2.5 license.
For more information about licenses provided for the content of this web site and the restrictions for re-use, read the complete Content License.
Google provides other optional services for your Android apps that have their own legal terms and restrictions. Such services include:
Any and all other services available for Android but not documented on developer.android.com are subject to their own terms, as documented on their respective web sites.