Vai Car



VAI arrived in São Paulo two years ago to change the car ownership industry.

No paperwork, no mileage limit and more. All in one app for you to drive as much as you want and achieve your goals with the car, be it leisure or work.


1- Create an easier booking flow to facilitate the user to rent a car.

Project structure

Before diving into the content, I wanted to start by highlighting how we structured the project. The well-known ‘Double Diamond’ became the strategy of how we organised our time and work. This section will be split into these phases to explain our process.


Focuses on exploration, research and gathering insights.

As soon as the brief was given, our next task was to delve deeper into the problem to understand where we could benefit the users. We knew from the brief that their primary persona for this project were unemployed. The company helps these people to work with Uber, 99 táxi, and give one chance to take money for his house.

Analyzing the competitors, we observed an old method for payments where the user has to travel to the company to make the payment, and the user was not informed by the number of days remaining of the car rental.

User interviews

TWe conducted in-depth interviews with clients of different ages and backgrounds in the office. In an informal and natural way, we let people tell about their experiences with car rentals, how they felt about renting and returning vehicles. We thoroughly analyzed the life cycle of a reservation, experimented with some visual aids and did some proximity testing with users like card-sorting and low-fidelity prototypes, but honestly, our best feedback tools were the interviews with former employees of competing rental companies and VAI employees. We learned a lot about how customers felt about the current booking model used by the largest rental companies in the country.

Users needs:

  • -Transparency of information

  • -Clarity of content being offered

  • -Good communication to find tenants

Users frustations:

  • -Old payment method

  • -Poor management

  • -Lack of control

  • -Lack of transparency


To identify the key problem and area to focus on and develop a clear design objective.

We knew from the brief that the primary persona is the driver, however, to get a better idea of who exactly we are solving this for, meet Pedro. He represents one of the main user groups.

Customer journey

Design principles

Based on our research and with a clear idea of what drivers need to rent a car, we defined 4 guiding principles to consider throughout the design process in order to best solve Pedro's need:

  • -The website should consistently demonstrate a sense of identity to inspire trust.

  • -The mobile app should have easy and effective processes to allow for an efficient experience.

  • -It should communicate the journey clear at all times.

  • -Facility the payments


Potential solutions are prototyped, tested, refined and tested again.

We began our design process by prototyping the solutions with theses steps:

  • -Paper Prototyping;

  • -Mid-fidelity;

  • -Property Creation Flow.

Decide & prototype

The creation of our final high-fidelity prototype and the project outcomes.

In our final design solution, we aimed to improve the content hierarchy and to clearly portray the company’s brand and services offered.


Next work

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