01
We set the constraints first
AAA contrast, a 48px minimum target, no interaction requiring two hands, and no critical information conveyed by colour alone. Fixed before the first screen was drawn, so nothing had to be retrofitted.
Halo Health
- Client
- Halo Health
- Discipline
- Mobile
- Year
- 2024
- Services
- Mobile App Design, Design System
05Halo Health
Halo Health supports people managing long-term conditions — the sort of software someone opens on a bad day, one-handed, in poor light, while tired. We treated those conditions as the design brief rather than an edge case.
The problem
Most clinical software is designed for the clinician and then handed to the patient. The vocabulary, the density and the assumed attention span all belong to someone who is at work, not someone who is unwell.
Accessibility here was not a compliance exercise. Tremor, fatigue, blurred vision and cognitive load are the everyday operating conditions of the actual users, not hypothetical impairments to accommodate at the end.
What we did
02
We cut the daily interaction to one tap
The single most frequent action — logging how you feel — became one tap from the lock screen. Everything else in the product exists at a distance from that.
03
We tested on bad days
Sessions scheduled with participants during flare-ups rather than only when they felt well. It changed the type size, the copy length and the entire onboarding flow.
Where it landed
WCAG 2.2 AAA on contrast across the product, verified by external audit rather than self-assessed.
Daily active use rose 41%. Participants described the app as "not tiring", which was the actual goal, however unmeasurable it sounds.
Results
Contrast compliance
Daily active use
Product design
Aktays
Accessibility strategy
Aktays
Design system
Aktays
Clinical review
Halo Health
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