Open Source libraries to speed up app developers

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:

> 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


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.


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.


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 3.1.1 Bugfix Release

Today, we released a new version of greenDAO addressing some issues with @Entity annotations. If haven’t tried them yet, please give them a try. We think this is the most convenient way to work with greenDAO, or SQLite in general. For details on the 3.1.1 improvements, please check the changelog.


The problem with hash functions in Java – and our solution

Today, core Java APIs lack high quality hash functions, and 3rd party implementations provide sub-optimal performance. As non-cryptographic hash function are important building blocks of software, this is a major bummer for developers.

Generally, the selection of available hash functions is plenty, and in the last decade, many new hash functions emerged with very good hashing properties. Surprisingly, the core Java API just still offers Adler32 and CRC32, which were designed as checksums many years ago. Of course, there are many hash implementations available outside of the core Java API. However, Continue reading

Android ORM Performance 2016

With greenDAO 3 released, it’s time again to look at the Android ORM performance landscape and do some benchmarks. This time, we also tested newer ORMs for SQLite like DbFlow, requery, SQLDelight, and SquiDB. Also, we had an extensive look at benchmarks done by others. Let’s get started with our results:

Continue reading

Spread the love