01
A toggle, not a form
GainedA whole schedule on or off in one tap.
CostAny detail change goes through the edit sheet.
Case study 04 — Self-directed concept
A medicine reminder for people who forget, and for the people who look after them: a caregiver can run the schedule for someone who cannot use the app.


01 — Two failure modes
The users who most need a reminder app are the least served by one.
02 — Interviews
One-on-one interviews, four consistent signals.
Personas built from the interviews
JennyEngineer, 31, two children
Runs the whole family's medicine; loses track of whose schedule is whose.
AurtherRetired, 63
Forgets doses through the day, finds modern apps unusable, and does not want to be a burden.
03 — Before pixels
Kept deliberately shallow: every core task two taps from the bottom bar.
Home
Appointments
Nearby
Parental
Account
04 — Four tabs
Four tabs, one job each. No nested menus.




05 — The parental feature
The most important flow runs when the primary user does nothing.


Fig. 02 — Jamie's schedule, run by the caregiver: medicine and appointments
06 — Four decisions
Choices that served both personas at once.
A — Stock
The counter turns red well before zero, so nobody is caught out mid-course.

B — Toggle
A whole schedule is one tap — no forms, no dialogs to get lost in. Removing one is a swipe.

C — Schedule
Time, days and duration together, with oversized numerals and generous targets.

D — Pairing
One scan from the caregiver; the other person configures nothing.

07 — Components
Soft surfaces, one teal, and a component for every repeated part.





08 — Account and support
The same system carried everything behind the tabs.








09 — Four calls
Four calls, and what each one cost.
01
GainedA whole schedule on or off in one tap.
CostAny detail change goes through the edit sheet.
02
GainedIt works for someone who cannot use the app.
CostConsent between two accounts has to be designed: the access code.
03
GainedNothing to set up for the older user.
CostPairing needs the phone in hand, or the code.
04
GainedCalm, for a product next to health anxiety.
CostField and card edges are faint for older eyes.
10 — What it left behind
A tested prototype, and one flow worth taking further.
ContrastRaise contrast on fields and cards, and test at arm's length with older users.
Missed doseDesign the escalation end to end: when the caregiver hears, and how.
MeasureTest adherence over weeks, not in a single session.
11 — Why it's personal
The parental feature exists because of my grandmother, who cannot use a smartphone at all. My sister or I handle her reminders remotely. The most important flow in this product is the one that runs when the primary user does nothing — because for some users, doing nothing is the default.
12 — Companion board
More screens and the research artefacts in presentation form:
Next — 05 / Building in public