Case study · Nanny · Child healthcare, B2C · 6 min read
My role
Senior product designer
I owned
Research, product strategy, information architecture, interaction and UI design, prototyping
Timeline & platform
3 months to MVP · Mobile app for new parents
RESEARCH & PROCESS IN NUMBERS
interviews with new parents over two weeks
of surveyed parents want personalised health guidance in an app
pain points that shaped one product
double diamond process to MVP
Nanny on mobile: track vaccines, celebrate milestones, revisit the growth story
The short version
The problem
New parents forget vaccination dates, lose paper cards and piece together advice from family and the internet. Existing apps covered consultations, pregnancy or articles, never all of it in one place.
What I did
Ran 28 interviews and a survey, mapped the journey and platform, and designed an MVP around three jobs: vaccinations, growth milestones and personalised reminders.
The outcome
One trusted source of truth for a child’s health that replaces the paper card and tells parents what to do next, with less effort and less anxiety.
The problem
01
Forgetting vaccination due dates
02
Losing or damaging the physical vaccination card
03
Anxiety from a lack of reliable parenting knowledge
04
Not knowing whether the child’s growth is healthy
05
Depending on family members for childcare guidance
Business opportunity
Research
said the biggest challenge of a newborn is having no time for themselves
would use an app that gives personalised info on an urgent health concern
had already used a childcare website or app
What parents told us
Key insights
01
Parents need proactive guidance
Most parents didn’t know what should happen next. They wanted the app to guide them, not to search.
02
Trust matters
Parents preferred recommendations from recognised medical authorities over community advice.
03
Paper records create friction
Vaccination cards got misplaced and appointment dates were forgotten.
04
Healthcare should reduce anxiety
Parents didn’t want complicated medical interfaces. They wanted reassurance.
Process and structure
Weeks 1–3
Discover
Survey, interviews, desk and competitor research
Weeks 4–6
Define
Personas, journey map, value proposition canvas
Weeks 7–9
Develop
Information architecture, wireframes, design system
Weeks 10–12
Deliver
MVP interface and heuristic review
Platform map: from sign-in to the dashboard and its four pillars
Whiteboarding the milestone flow: what to remind, record and celebrate
Reviewing flows with the team before wireframes
Key design decisions
01 · Vaccinations
Parents usually update a record right after a hospital visit, often while holding their child. The flow keeps the main action visible, protects the accuracy of a permanent health record, and ends on reassurance.
01 · One-tap completion
“Mark done” is always visible instead of hidden in a menu.
02 · Confirm the date
Parents pick the real vaccination date, so history stays accurate.
03 · Proof now or later
Attach the vaccine tag immediately or defer it, so compliance never blocks the flow.
04 · Review before saving
Vaccine, date and proof are checked before they become permanent.
05 · Celebrate progress
A warm success state replaces a generic confirmation.
02 · Growth milestones
Milestones follow CDC guidance and are grouped by age and category, so parents know what to expect now. Ticking one off is a single tap, and each achievement can become a photo memory.
01 · Age-based categories
Social, communication, cognitive and physical milestones for the child’s age.
02 · Tap to complete
Immediate visual feedback makes progress feel effortless.
03 · A moment to celebrate
Positive reinforcement builds an emotional connection.
04 · Capture the memory
Milestones become a visual story parents can revisit.
03 · Personalised reminders
Instead of generic alerts, reminders are tailored to the child’s profile: upcoming vaccines, age-appropriate activities and developmental check-ins. Parents stay ahead of important dates instead of reacting after they’re missed.
Vaccination
It’s Ayan’s vaccination time
Influenza vaccine due on 24 March
Activity
Cuddle, talk and play
It’s time for Ayan’s daily activities
Milestone
Yay! A new milestone achieved
Today Ayan starts learning a new activity
04 · Home and timeline
The dashboard brings the next doctor’s appointment, vaccines due, daily activities and milestone progress into one glanceable view, so parents never have to hunt for what matters. The timeline turns every logged moment into a chronological story, and the empty state invites the first entry instead of showing a blank screen.
01 · Dashboard
Next appointment, vaccines due, daily activities and milestone progress at a glance.
02 · Timeline
Vaccines, milestones and photos gathered into one chronological story.
03 · Empty state
A friendly first step that explains what will appear and why it helps.
Interface and design system
Dashboard, vaccination card, milestones and timeline components
Clear hierarchy
The next action is always the most obvious thing on screen
Accessible by default
Readable type and large touch targets for one-handed use
Medical-grade trust
Clean layouts and recommendations from recognised authorities
Built to scale
Reusable components and consistent interaction patterns
Outcome
Less mental load
Managing vaccinations and child healthcare takes less effort
Clearer path
Critical tasks are easy to find through a guided flow
More confidence
Contextual guidance and personalised reminders
One source of truth
Vaccines, growth and milestones in a single digital record
What I learned
