Tenis invisible: compite usando tu móvil como raqueta

Filed on 25 / 11 / 2013
€ 34
€ 8.950
€ 17.200
2 Backers
Contributing € 9
Your name will stay in our app and website forever

Names of people and institutions that contribute to this project will be in a credits screen forever.

> 01 Backers
Contributing € 15
PLUS. Your name + your email + your website

ALL PREVIOUS REWARDS + You will be in the first positions in the credits screen and you will have the chance to write your contact details, for example an email address, and promote your website. This is also good for boosting up the Page Rank of your website.

> 00 Backers
Contributing € 19
Constant update of the state of the project and possibility to make suggestions

ALL PREVIOUS REWARDS + You have the chance to be added to the mailing list in order to be informed about developement processes. You will be able to make suggestions, which we will take into account for sure.

> 00 Backers
Contributing € 25
Access to secret game

ALL PREVIOUS REWARDS + We will design an exclusive secret game inside the app only for you.

> 01 Backers
Contributing € 50
Possibility to be a programmer or a tester

ALL PREVIOUS REWARDS + You have the chance to develop parts of the app or make research. You will be credited in the developers section with your email and website. You will be able to add this project to your CV and we will always confirm that you worked with us.

> 00 Backers
Contributing € 150
Play with our app for testing purposes and free guided visit to the Centro de Supercomputación MareNostrum of Barcelona

ALL PREVIOUS REWARDS + Come and play face-to-face or through internet for testing purposes and add this experience to your CV. Moreover, you will be invited for a free visit of Centro de Supercomputación MareNostrum of Barcelona.

> 00 Backers
Contributing € 290
Your webpage will be integrated with our website as well as your back links

ALL PREVIOUS REWARDS + We will integrate your page with the provided title, text and backlinks in order to promote you and increase your Page Rank.

> 00 Backers
Contributing € 500
Your photo and name will be shown in 'automatic players' column

ALL PREVIOUS REWARDS + When a user plays a 1-player game the photo and the name of the person that you choose will be among the automatic players. Each player will have his own properties.

> 00 Backers
Contributing € 3.000
Your photo on the cover of the app

ALL PREVIOUS REWARDS + Your photo (or the photo of the person that you choose) will appear on the cover of the app (splash screen) like a professional sportman. Thousands of people will be able to see you forever.

> 00 Backers
Contributing € 5.000
Sponsor logo or big banner in our app and website forever

ALL PREVIOUS REWARDS + Promote your company with your logo or banner. Our aim is that app will be downloaded and used by millions of people. We can negotiate how to do it.
Additionally we can include or adjust the name of this app taking your company's name into consideration, but this is not included in that reward. For more information contact us!

> 00 Backers

About this project

App about a new sport for blind people and non-disabled people in which the tennis player orientates himself through sounds.
Task Minimum Optimum
Graphic design
In order to develop an application with an attractive user interface we need professional graphic designers. An app without an easy and attractive interface cannot be successful. This graphic design could be used in all operating systems: Android, IOS, Windows Phone, etc.
€ 3.800
Material Minimum Optimum
Mobile devices for developement: apps, tablets, etc.
We want to develop and test our app for all kind of devices. We need at least the most commonly accesible mobile devices. We must consider size of the screen, availabilty of accelerometer, gps, gyroscope, etc.
€ 1.300
Audio equipment
3 active noise cancellation headsets (1 on-the ear and 2 in-the-ear) in order to get a perfect isolation during the developement of the sounds.
€ 1.050
Infrastructure Minimum Optimum
Webpage: rankings, users online and information
We need a professional website connected to our mobile app translated to many languages. Moreover, we will publish the world ranking of players with all their information and statistics and the players waiting for opponents online in real time.
€ 2.900
Costs related to our crowdfunding campaign
We will face the following costs: -- professional video -- taxes of Goteo and bank transfers (http://goteo.org/faq/sponsor#q98) -- promotional images -- rewards for contributors -- communication costs
€ 950
Solution of problems and bugs during the development
During the development of mobile apps (especially those that use connectivity and devices such as GPS, accelerometer and gyroscope) many unexpected issues come out. Solving them take more time than the whole developement of the project itself.
€ 4.900
Marketing plan to broadcast our app
We need native people that spread out this project in several countries. They must contact different organisations in their countries (organisations of people with disabilities, cultural associations, etc.) during and after our crowdfunding campaign.
€ 900
Improvement of the webpage
We will make our website more sofisticated and secure. This requires extra budget.
€ 500
Related games such squash or paddle
Once we finish our tennis app we want to create different games and open a way for a new generation of sports.
€ 900
Total € 8.950 € 17.200

General information

'Invisible tennis' is an open-source app project for Android, IOS, Windows Phone and other operating systems in which users play tennis with a virtual ball and use their device as a racket. This new sport was designed for blind people, those with other disabilities and also non-disabled ones.

Players orientate themselves through sound and vibration coming from their device. Our aim is to create very accurate sounds so each player knows where the ball is, and what is his own and opponent's position on the court. We also want to analyse the movement of the racket (mobile device) in order to make the hit as accurate as possible.

You can set a 1-player game or 2-players game (face-to-face or through internet). The match will be broadcasted via internet and everybody will be able to watch it on their devices with the representation of the ball and players in real time. A world ranking of players will also be created.

If we have enough financial resources we will create new games such us squash, fronton or paddle.

Description of the project. Main features, strengths and differentials.

The app will track the position of the players as well as the direction and speed of the ball. Matches can be watched on other devices in real time with the updated view of the players and the virtual ball positions.

The court can be real or vitual. A real court consists of two players competing face-to-face on the site with real distances. A virtual one consists of, for intance, a game between a player from New York against one from Berlin. The dimensions of the court can be customised in each game.

Different game levels and modes will be developed.

A world ranking of online players waiting for a new match will be shown in real time. That will be visible through our app and through our website.


Everything related to GPS, accelerometer and gyroscope.

Why this is important

In the beginning it was aimed to be designed mostly for people with visual disabilities. But as it turned out anyone can have fun and play this game anytime anywhere by using only their mobiles.

Goals of the crowdfunding campaign

As engineers we have designed the structure and specifications of this project. If we want a professional result in terms of engineering, usage and appearance we need your contribution.

Our aim is that millions of people will enjoy playing this game soon.

Team and experience

We have experience in the management of mobile applications, specially for Android.


Aitor F. Martínez:
He is a telecom and aviation engineer at Universitat Politècnica de Catalunya. He has international experience and knows several foreign languages. He has lead many proyects for mobile apps, especially for Android operating systems and related to language learning.
You can download and check for free his apps at www.lingua2.net. You can also check his language exchange site: www.lingua2.eu

Daniel Guerrero López
He is a telecom and aviation engineer at Universitat Politècnica de Catalunya. He has worked in engineering enteprises as technical manager for research and development projects. He knows several programming languages, mainly Android.

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