Low fidelity prototype with static mockups. Unfortunately no resources for an interactive high fidelity prototype but lots of information on each screen explains the expected behavior.
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Inception of app: Everything starts with some thoughts on a piece of paper before you go to bed at night
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Logo designed with Inkscape tool
Business card for stakeholders to be printed and be shared in events and other situations
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This is a mindmap created with Freemind (aka Mindmeister) tool. All the necessary steps for implementation are described so the logic is solid before any real implementation takes place.
The Problem, the Solution and the mission of the app
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Successful online collaboration with the rest of the team. As always for a good result two or more people should work on the same piece of paper imagining and describing ideas, problems and solutions even if the result looks like that. Brainstorming is fun!
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Zerobill (aka Fcarrier)

Fully automated carrier reminder on every phone call ..you do nothing but enjoy!

How many times did you wish to know the network carrier of the person you are talking to?

Fcarrier reminds you the phone carrier at the other end of the line, the moment you need it the most. On every phone call either incoming or outgoing!

Fcarrier is not just another free app. It is much better! It saves you money.

If you have let’s say carrier X and some of your contacts use the same carrier X then you will probably pay a lot less if you talk with them than talking with people who use other carriers.

Fcarrier changes the way you correspond to your phone calls. Keep it short if it is an expensive phone call or talk endlessly otherwise.

By changing your behavior against phone calls you can, at last, cut your phone bill.. a lot!

What would you do if you had a little extra money each month?

Do not miss the blog that is supporting this application: http://zerobillblog.tumblr.com/

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Georgios Pligoropoulos​
User Experience Designer Θεσσαλονίκη, Greece