Roger Vilanou’s new book "Cómo crear tu app de éxito"

The book “Cómo crear tu app de éxito” (How to build a successful app) is written for all the entrepreneurs and startups who dream of launching a mobile app but don’t know where to start. More than a theoretical manual, it is a practical guide that shows, step by step, how to turn an idea into a real app, validated and ready to compete in the market.

The book gathers the knowledge accumulated over more than 20 years of experience developing mobile apps for startups, companies and major brands. In the digital sector, where early mistakes can cost time and money, having a resource like this app development book is a huge advantage for anyone who wants to start a business with confidence and strategic vision.

How “Cómo crear tu app de éxito” came about

The book has its origin in the personal experience of Roger Vilanou Vallès, co-founder of Doonamis. Throughout his career, he has guided hundreds of entrepreneurs through the process of creating an app from scratch, seeing at first hand both what goes right and the most common failures.

This guide grew out of that experience: a resource that seeks to spread knowledge, stop entrepreneurs from repeating costly mistakes and offer a clearer, more direct path to success. Roger does not just explain the “what”: he also shares the “how” and the “why” behind every key decision in developing an app.

What’s in the book: from idea to published app

The content is organised into 20 chapters that cover the whole life cycle of a mobile app:

In short, it is a roadmap designed to take any entrepreneur from the first idea through to launch and subsequent growth.

How to validate your app idea without spending money.
What the differences between B2B and B2C apps are and how to approach each one.
Which legal aspects to consider in order to protect your app (patents, intellectual property, etc.).
Which tools to use to design, test and communicate the idea.
Why accessibility and inclusivity are key and how to implement them.
Which business model to choose (freemium, subscription, etc.).
How to monetise with advertising and which platforms to use.
Which mobile payment gateways to implement and how to guarantee security.
Which type of app to develop (native, hybrid or web) and how much it can cost.
How to structure and carry out the development process step by step.
Which privacy regulations you must comply with (such as the GDPR) and how.
Where and how to secure funding to launch or scale your app.
How to promote your app: ASO, social media, influencers and more.
Which metrics (KPIs) to use to measure success and scale like a startup.

Validating your idea with no initial investment

One of the most frequent mistakes entrepreneurs make is investing too early in development. The book explains how to check whether there really is a market for your idea without spending money, using validation tools such as interviews with potential users, digital surveys, A/B tests or landing pages that simulate the final product.

The aim is clear: not to build an app nobody wants to use, but to confirm first that the idea meets a real need.

Choosing the right business model

Choosing the business model is one of the most critical decisions for the success of an app. Roger sets out the main options – freemium, subscription, one-off payment or advertising – and how to choose the most suitable one depending on the type of app, the target audience and the growth strategy.

He also devotes space to explaining how to adapt to different markets (for example, the differences between B2B and B2C users) and how to structure monetisation from day one.

Legally protecting your app

The legal side tends to be one of the least familiar areas for digital entrepreneurs. The book offers a clear guide on how to protect the intellectual property of an app, what types of patents exist, how to register a trademark and which regulations (such as the GDPR in Europe) must be complied with to avoid legal problems in the future.

This knowledge brings peace of mind and professionalism to any project.

Prototyping and testing with key tools

Before investing in development, Roger explains how to use prototyping tools to design and test the idea. This makes it possible to show a prototype to potential users, investors or partners without having to write a single line of code.

The book also offers recommendations on accessible testing platforms and advice on gathering real feedback to improve the product before launch.

Monetisation and funding strategies

Beyond the choice of business model, it is essential to plan how to monetise and fund the app at each stage of the project. The book covers everything from classic options such as advertising or subscriptions to finding investors, crowdfunding or startup accelerator programmes.

This is a key section, as many promising apps fail for lack of a clear financial strategy.

Marketing and growth metrics

An app’s success does not end once it is published in the app stores. To grow, it has to be promoted and its results measured. Roger devotes a whole chapter to explaining digital marketing techniques specific to apps, such as ASO (App Store Optimization), the use of social media, influencer campaigns and loyalty strategies.

It also includes a guide to key metrics (KPIs) that make it possible to measure retention, user acquisition cost or the scalability of the project, helping entrepreneurs make decisions based on real data.

Who should read it

This book is aimed at a wide audience within the entrepreneurial and technology ecosystem:

In short, anyone interested in turning an idea into a real app will find this book a clear, practical guide.

Entrepreneurs with an app idea but no technical experience.
Startup founders looking to validate or scale their product.
Developers who want a business perspective beyond the code.
Marketers, consultants and investors who need to understand the whole process.
Students, digital professionals and anyone curious about the mobile world.

About the author: Roger Vilanou, co-founder of Doonamis

Roger Vilanou Vallès is co-founder and Managing Director of Doonamis, the leading mobile app development company in Spain. With more than 20 years of experience, he has worked with entrepreneurs, startups and major brands, supporting projects from conception through to consolidation in the market.

His strategic vision, combined with his practical experience, has allowed him to identify what makes an app stand out and how to avoid the most common mistakes. With this book, he shares that experience with the aim of inspiring and guiding new digital entrepreneurs.

Where to get “Cómo crear tu app de éxito”

The book is now available on Amazon, and is designed both for those looking to start out with their first app and for professionals who want to broaden their knowledge of mobile strategy.

“Cómo crear tu app de éxito” is, in short, the guide that every digital entrepreneur should have in their library. A practical, accessible resource full of real examples for going from idea to success in the competitive world of mobile apps.