Case study: Designing a facial skin diagnosis application

User Research

During my user research, I had the opportunity to conduct several individual interviews with women between the ages of 20 and 45 to better understand their personal experiences (emotional side) regarding their skin, the problems they encountered and the obligatory passage to skin diagnosis, for some of them. To complete the picture, I did a thorough research on blogs and forums to collect additional data on skin diagnosis experiences and their testimonies.

  • Women perform a skin diagnosis as soon as they see signs of one or more problems (aesthetic trigger). This is not a trivial act that is part of a routine.
  • They want to understand the particularities of their skin in a simple and understandable way, and to be able to include them in a daily reflection. That is to say, without curves, without ultra-technical terms, basic things.
  • Finally, they need support on how to use the product, when and at what stage to apply it. An end-to-end diagnosis is really a necessity to have effective results.

Two complementary personas

Indeed, the majority of users, whatever their profile, are in a research and understanding approach of their skin.

Problem Statement

Finally, women between the ages of 18 and 55, who use cosmetic care, need to carry out skin diagnostics because they encounter skin problems throughout their lives that can affect their sense of inner and outer well-being. This well-being can only be achieved if the level of advice and explanation is sufficient, understandable and interesting.

How can we help women identify their skin problems and provide them with a sufficient amount of information?

Before starting the ideation phase, I am interested on competitors in the skin diagnosis market, a very successful and growing market.

Facial skin diagnosis, the Eldorado of single brands

There are many competitors, most of them are single-brand. They have a skin diagnosis service to advise and recommend the brand’s products to their customers, some even offer a complete beauty routine. The discourse is generally thoughtful and benevolent towards users, nevertheless we often find numbers and gauges with a lot of technical terms, more or less understandable.

Mapping of competitors


Thanks to all my research, I have identified three angles of attack:

  • To accompany to correct or even solve skin problems thanks to a 360° diagnosis;
  • To allow the identification and the definition of the characteristics of its skin and its problems in a comprehensible way;
  • To make the facial skin diagnosis, a daily act anchored in the habits of life in a continuous way.
  • A diagnosis in 2 steps: 1) a questionnaire allowing the user to detail her possible problems and what she sees on her skin, with information points available when the question needs to be clarified. 2) uploading or taking a photo to complete the questionnaire, which is analyzed by an algorithm;
  • A complete diagnostic page of your face, with a pedagogical and understandable speech, explaining the specificities of your skin, daily advice and points of concern to correct;
  • A personalized beauty routine, for the morning and evening, with access to detailed product pages.
Diagnosis in 2 steps
Face diagnostic page & personalized beauty routine

Task flow

This is what the identified task flow looks like :

  • Two steps when performing the facial skin diagnosis at the beginning of the questionnaire and before taking or uploading a photo, to properly guide the user;
  • Information points to guide the user during the questionnaire for a better understanding
  • Focus on essential points to share with the user and that catch the eye: goal, opinion, recommendation, advice
  • The possibility to be redirected very easily to the purchase site of the recommended product

EvolveSkin, an app that is good for your face

  • Diversity: because it is accessible to all women, whatever their age, their skin color, their skin type, etc.
  • Benevolence: because the objective, beyond the pure diagnosis, is to share advice, recommendations and opinions to guide the consumer in a pedagogical way
  • Commitment: because the application offers product recommendations that are mostly environment-friendly (organic, vegetable origin, cruently free), some brands are non-gender

Visual Design

From a graphic point of view, I wanted to highlight four strong values:

Moodboard for EvolveSkin App
Style Tile for EvolveSkin App

Tests & evolutions

After my tests, I corrected some points:

  • Choose only 2 fonts, and reduce the number of text levels to improve comprehension
  • Increase the line spacing and space the contents to enhance readability
  • Emphasize the content of the cards by playing with illustrations and colors to bring dynamism

Final prototype

To discover our prototype and Victoria’s user flow, it’s here 👇 :

What I’ve learned

For this new project, it was the first time I had to work on an end-to-end project alone and I don’t want to hide that it was difficult to deliver a high-level product in a short time. Also, I am a little bit frustrated to put some aspects away and focus on only the selected features.



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