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Case study · 2025

Lumina Glow

An app that shows how food affects your skin: scan your face and your meals, and follow your skin week by week.

Company
CodeGeeks
Role
Sole UX/UI Designer
Platform
iOS and Android app
Scope
Onboarding, scans, skin dashboard, paywall
Lumina Glow on three phones: a ramen bowl scan with a B- grade, the skin dashboard with face scan results, and the 3-day free trial paywall.

The task

A long onboarding worth finishing

Lumina Glow helps people understand how what they eat shows up on their skin. Before the app can help, it needs to know a lot about the person.

The goal was to make a long onboarding personal and worth going through, so people reach their plan:

  • many questions, without feeling like a form;
  • a face photo, which people are careful about;
  • value before the paywall, not after it;
  • a trial people can trust.

How I worked

From the client’s wireframes to the final UI

I was the only designer on the project. The client came with wireframes and early ideas; I designed the UI and improved the flows.

  1. Wireframes and ideas from the client as a starting point.
  2. Competitor analysis and a review of apps of this type.
  3. Regular discussions with the client about the flow and priorities.
  4. UI for every screen of the onboarding, scans, plan and paywall.
  5. Improvements to the flow: what to ask, in what order, and when to show value.

Key decisions

What makes it work

Six parts of one flow, from the first question to the trial.

One question per screen

A progress bar, one action and a short “why we ask” under sensitive questions. The name and goals come back later in the personal plan.

The first screen: Lumina Glow helps you improve your skin 3x faster, with a chart comparing Lumina and conventional methods.
The promise
Quiz question: choose your gender, with a note that it is used to personalise the experience.
One question
Quiz question about the menstrual cycle with a note explaining why it is asked.
Why we ask
Quiz question: how do you want to use Lumina Glow, with six goals to pick from.
Goals

A face scan people feel safe with

Before the camera: why the photo is needed and how it is stored. Tips for a good photo: bright light, no filters, no makeup. The scan becomes the current skin score and a target, so progress has a goal.

Time for your skin assessment, with a note that photos are encrypted and can be deleted at any time.
Why a photo
Take a front-facing photo: bright light, no filters, no makeup.
Photo tips
Analyzing your skin health at 34%, with a list of what is being set up.
Analysis
Skin health result: current C+ 77 out of 100 and expected B 83 out of 100.
Now and target

Pain in pink, relief in green

Symptoms include feelings, not only skin: being judged, avoiding social life, stress. Every pain has a positive answer. Soft pink for the problem, the calm brand green for the solution.

Select your symptoms, grouped into mental and emotional, and lifestyle and physical.
Symptoms
Feeling Judged: a pink screen about how people with skin concerns feel.
The problem
Avoiding Social Life: a pink screen about skipping meetups and photos.
The problem
A Fresh Start: a green screen promising step-by-step guidance.
The answer

A food scan you can read at a glance

A letter grade, three skin risks with scales, and every ingredient marked as good or bad. People can scan their first meal during onboarding or skip it.

Now try it for yourself: take or upload a photo of a meal, with a link to skip this step.
Try it now
The camera framing a ramen bowl.
Scan
Ramen Bowl scored B-: bloat, inflammation and acne risk scales, and each ingredient tagged good or bad.
Result

A plan and a daily dashboard

A personal plan with a target date, reviews from people like you, and a daily dashboard with a weekly streak, face scan results by zone and what to eat.

Emma, we made you a personal plan: a target date, rating and the journey to balanced skin.
Personal plan
Lumina Glow was made for people like you: reviews from three users.
Reviews
Daily dashboard: weekly streak, face scan result B-, detailed skin results and what you should eat.
Dashboard

An honest paywall

“No payment due now” above the button, a reminder before the trial ends, and a clear timeline: today, a reminder on day 2, billing on day 3. Monthly and yearly plans side by side.

We want you to try Lumina for free, with the app on two phones and No payment due now.
Free trial
We’ll send you a reminder before your free trial ends.
Reminder
Start your 3-day free trial: a timeline for today, day 2 and day 3, and monthly and yearly plans.
Trial timeline

What I’d test next

Hypotheses, not results

These are ideas for A/B tests, not measured results.

  1. PaywallShow the trial timelineA: only plans and price. B: today, a reminder on day 2, billing on day 3. Clear terms remove the fear of a hidden charge. Metric: trial start rate.
  2. OnboardingLet people try the food scan firstA: paywall right after the quiz. B: scan the first meal, then the paywall. A real result before paying makes the subscription feel worth it. Metrics: paywall conversion, drop-off at the scan.
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