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Mobile Developer's Guide to the Galaxy

Our free handbook for app developers, designers and managers

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A Community Publication about All Things Mobile

This project was initiated in 2009 with the aim to spread knowledge about mobile technologies and encourage people to enter our community or deepen their existing knowledge.

More than twenty writers from the mobile community share their know-how in dealing with topics such as accessibility in mobile apps, UX design, mobile analytics, prototyping, cross-platform development, native development, mobile web and app marketing.

As of today, more than 100,000 hardcopies have been distributed since 2009. Universities and schools in Germany, Netherlands, UK, Spain and South Africa use the book as teaching material. The electronic versions (ebook and pdf) have been downloaded hundreds of thousands of times and the content has been translated into several languages.

Our 18th Edition

  • The comprehensive manual for beginners and professionals in the mobile business
  • More than 320 pages on app design, UI and UX design, app programming and app marketing
  • Independent, objective
    and free

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Open the PDF version

18th edition (english)

Don't Miss a Single Edition

For each new release, the whole content is completely reviewed and updated.

In older editions, for example, there are texts on the development of Bada apps, BlackBerry Java Apps, Augmented Reality and other topics, which are no longer contained in the current version for reasons of topicality or space.

Here, you can rummage through some older issues. On request, we can also send you hardcopies of previous versions.

We release a new version of the Mobile Developer's Guide once a year. If you would like to get in touch with us feel free to send us a message.

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Many Thanks!

We acknowledge with gratitude the writers, editors, translators and designers who contribute their work free of charge.

This project would not have been possible without the ongoing support from the mobile community. These are the folks who are involved as authors this time. Some of them have been on board for eight years already, while others just recently joined. All are awesome.

Become a part of it. Please get in touch if you want to support the project as an author, distributor or sponsor.

Get involved!

Meet our writers

Andrej Balaz / Independent Service & UX Designer, Partner at Revealed

Andrej works at the intersection of research, strategy and service design. He combines tools and perspectives from design and market research, bridging both disciplines to discover and define new opportunities for growth. Andrej previously worked at the service innovation studio IXDS and helped clients such as Bosch, Deutsche Bahn, Fraunhofer, Applause and others to turn research insights into new services.
Andrej is currently a Partner at Revealed, a consultancy that empowers businesses to create sustainable growth through deep understanding of why consumers buy and use products. Revealed has worked with teams at Netgear, Asana, Twitter, Pipedrive and Arlo to name a few.

Twitter: @Designamyte

Oscar Clark / Unity Technologies

Oscar Clark is an author, consultant and evangelist for Everyplay from Unity Technologies. He has been a pioneer in online, mobile and console social games services since 1998. He provided 'vision' for one of the first Online games communities (Wireplay - British Telecom); was the global lead for games at Hutchison Whampoa (3UK) which included (perhaps) the first mobile in-App purchase, and was the Home Architect for PlayStation®Home. He is a regular columnist on PocketGamer.Biz and Develop-Online, an outspoken speaker at countless games conferences, a mentor for accelerator GameFounders and has guest lectured for several universities. His first book, "Games As A Service - How Free To Play Design Can Make Better Games" is available online.

Twitter: @athanateus

Linda Harnisch / Customlytics

Linda works as a communications and content manager writing articles and blogs on mobile app topics. She has developed a deep appreciation for mobile technologies making her (and people’s) lives easier. As a previous sociology student, she advocates for using empirical data and analytics to shape e.g. marketing and communications decisions. Linda has worked in PR and marketing with a focus on connecting business communities through networking experiences. At Customlytics she is drawing on that experience by shaping the company’s partnership strategy.


Ruadhán O'Donoghue / Western Technological

Ruadhán is a web developer based in Ireland. He has worked in web development since 1999, and developed his first mobile web application, a WAP dictionary, back in 2000 when the mobile web was built on WAP and WML, and was browsed on tiny monochrome phone screens. Since then, he has worked in many different roles including Head of Engineering at Afilias/dotMobi. As an editor and contributor to mobile technology site for over 10 years, he writes articles on mobile web development regularly. He published his first book, "AMP: Building Accelerated Mobile Pages" in 2017. He now runs his own web consultancy, Western Technological.

Twitter: @rodono

Daniel Böhrs / Open-Xchange

Daniel started developing software in 2006 with PHP and web development. During his computer science studies he focused on Java and especially Android development. After obtaining his master's degree he joined Enough Software in 2015, which later got acquired by Open Xchange. In the company, he is mainly an Android developer, although he sometimes helps out in the server development area. 

Twitter: @Boehrsi

Christian Eckhardt / Customlytics

Christian is the CEO & Co-Founder of Customlytics where he helps app companies to establish a solid marketing analytics and technology infrastructure. Among many other things of course, such as growing the company and making sure his employees and colleagues are happy. Previously to founding his own company, Christian gained extensive mobile marketing and product management experience at Delivery Hero, growing the international app business. Christian’s expertise in mobile marketing is pretty varied with a keen interest and focus on mobile CRM, product management and performance marketing. You can also find him frequently on stage as a speaker for various industry events such as App Promotion Summit or Mobile Growth Summit. He also is the co-coordinator of this book project.


Swen Hutop / swenden

Swen is Managing Director and Co-Founder of swenden. With his digital product expertise, he supports companies in the space of app development. This incorporates conceptual work, programming and a huge portion of consulting. He always strives for clean and easy solutions.

Twitter: @swenden_de

Cathy Rundle / RNIB

Cathy is a User Experience Manager at RNIB and together with her team works with companies on their products, websites and apps to improve the usability and accessibility for blind and partially sighted people. This includes design, heuristic assessments and user testing with blind and partially sighted people.

Laura Spikermann / Customlytics

As an app marketing consultant, Laura is making sure that app companies are set for success now and in the future. One of her major fields of expertise is advising apps on their app store optimization activities. If you want to know how to drive conversions and gain visibility in the Google Play and Apple App Store, she is the one you should turn to. Together with the graphic design department at Customlytics, she is developing engaging creative assets for app product pages in the stores - and she has eagle eyes for any askew alignement. Other areas of her expertise include mobile CRM topics and tracking.


Dean Churchill / AT&T

Dean works on secure design, development and testing of applications at AT&T. Over the past several years he has focused on driving security requirements in mobile applications, for consumer applications as well as internal AT&T mobile applications. He has been busy supporting AT&T's emerging Mobile Health and Digital Life product lines. He lives in the Seattle area and enjoys downhill skiing and fly fishing. 

Julian Harty / Commercetest

Julian's mission is to help people live better lives through mobile technologies. He has worked globally in leadership and engineering roles for Google, eBay, Salesforce, Klarna, Badoo, and many others to help improve engineering practices and deliver better quality software while also improving the fulfillment and motivation for the people involved. He has been actively involved in the modern mobile ecosystem since 2006 and this guide from 2010 onwards. Currently, he is working independently, writing mobile apps & suitable test automation tools, and helping others to improve their mobile apps. He is also trying to complete his PhD on improving development and testing of mobile apps.

Twitter: @julianharty


Dennis Kluge / swenden

Dennis is the Managing Director and Co-Founder of swenden. He consults clients in the field of digital product development. Topics cover conception, implementation and product validation. Everything in a lean way. From time to time you will find him giving workshops and speaking about his experiences and knowledge.

Twitter: @swenden_de

Marc van 't Veer / Polteq

Marc is a mobile app test expert at Polteq and has worked in different test roles for over 14 years. He is helping companies with test process improvement (TI4 Mobile approach), mobile device analysis, mobile test strategy, implementing mobile test automation and giving the in-house developed mobile trainings (mobile app testing foundation, mobile automation, API manual and automated testing). Currently Marc performs research for Polteq on testing AI, is program chair for the Polteq conference and is running projects for multiple companies.

Twitter: @marc_vantveer

Robert Virkus / Open-Xchange

Robert has worked in the mobile industry for more than 20 years. Having been involved in a number of open source projects, and initiating one of the most successful pre-smartphone mobile app development frameworks, he tries to push the envelope based on open & permission-less standards. In his spare time, he likes to draw, play with his retro computers and spend quality time with his family. Robert has given talks at various conferences such as Droidcon, CeBIT, MobileTech Conference and more. He is currently product manager for e-mail and chat apps at Open-Xchange.

Twitter: @robert_virkus


Say hello to our designers

Sarah Duwe/ Open-Xchange

Sarah is an apprentice for digital media design at Open-Xchange. As part of the mobile design team at OX, she is involved with UI, UX and graphic design for mobile applications. She is also responsible for the design of this guide. In her time off she likes to play video games and to create digital illustrations.

Cornelius Kwietniak / Open-Xchange

Cornelius specializes in graphic, UI, UX and visual design for mobile applications and other interactive technologies. He was in charge of the layout and design of the previous guides. When not involved with something mobile, he loves to experiment with digital art and illustration.

And these are our editors

Mladenka Vrdoljak / Open-Xchange

Mladenka is working as a UI/UX designer at Open-Xchange. That means she is engaged with User Interface, User Experience and graphic design for mobile applications, as well as coding. She has been responsible for the layout, design and text editing of previous editions of this guide. For this edition, she was in charge of the text editing. In her spare time, she likes to travel, draw, play the guitar and video games.

Twitter: @_mladenka

Marco Tabor / Open-Xchange

Marco started working in the mobile software business in 2005. Three years later, he joined the dream team at Enough Software where he has been responsible for PR, sales, project management and much more. Since the Enough Software team has become a part of Open Xchange in 2016, Marco fully concentrates on his role as a product owner, mainly for mobile apps. He is also the main coordinator of this book project since its first edition.

Twitter: @enoughmarco

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