Open Source libraries to make apps and app development fast and fun - less boilerplate and managing infrastructure code

Our open source libraries run on over a billion devices and are used by large companies with especially high performance requirements.
Learn about our widely used, battle-tested, and performance-optimized open source libararies for mobile app development:

> 2.000.000.000 people rely on greenrobot libraries

Slim & fast - that is what we stand for and that is why thousands of mobile developers wordlwide use our solutions, leading to more than a billion mobile users relying on our code

apps fast on the road

Superfast

Above all, we value performance. Speed matters. Thus, we constantly benchmark our solutions against alternatives and optimize for performance.
lean and light development

Lean & light

We keep all our solutions small and frugal. We also ensure all our open source libraries are optimized for maximum battery-friendliness. Perfect for mobile.
Easy to use libraries

Easy-to-use

We are developers ourselves and value the fun aspects of coding. Accordingly, our libraries are easy to use and save developers from tedious and unituitive tasks.
Open development

Developer-driven

We are passionate to deliver high performant, slim, and elegant solutions. Our libraries have more than 15.000 GitHub stars and are industry-proven.

Mobile News from greenrobot

Library updates, new releases, related developments in open source, mobile databases, and Android

greenDAO Public Release

Today, we release greenDAO to the public. greenDAO is an ORM tool for Android that maps Java objects to SQLite database tables. It does that pretty quick and offers a nice and clean object oriented API for Android developers. With greenDAO, you write less SQL (or no SQL at all) and work directly with objects. During greenDAO’s development, we did not compromise on performance. We believe it’s the fastest ORM tool for Android around. Have a look at greenDAO’s features for more details.
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