Designing an interface a 79-year-old will actually use
Most products in this category are family-facing only. That's a comfortable choice, and it quietly makes every piece of data second-hand.
If the older adult never opens the app, then "dose taken" means "a relative believes a dose was taken". "Feeling well today" means "nobody has heard otherwise". The record fills up with inference. And inference is exactly what the family already had before they installed anything.
So the senior interface isn't a nice extra. It's the thing that makes the rest of the record true. Which means it has to be good enough that someone who doesn't enjoy using a phone will use it every morning, unprompted, for years.
It is not a bigger font
The common approach is a text-size slider. Scale the family interface up 30% and call it accessible. This fails immediately: a dashboard designed for density becomes a dashboard designed for density with the labels colliding. Everything still competes for attention, and now you scroll three times as far to find it.
Senior Mode in AgeCare is a separate set of screens with a separate job. The design rules are few and non-negotiable:
- One column. No side-by-side comparisons, no cards that reflow into a grid on a bigger screen.
- At most six choices per screen. If a seventh is needed, the screen is wrong.
- 64 px minimum controls, against 48 px elsewhere in the app, because hand tremor and thumb size are real, and a mis-tap that confirms medication is a serious mis-tap.
- Plain language. "Time for your medicine", not "Scheduled dose pending confirmation".
- No charts and no percentages. "You have taken 2 of 4" is information. "94% adherence" is a performance review.
- The current time and day, always visible. An orienting detail that costs nothing and settles a surprising number of questions.
One interaction matters more than the rest
Every screen in the senior interface exists to make one action easy: "I have taken it." It's the largest control on the medicine screen, it uses the same words every time, and it is followed by a confirmation step, because an accidental tap that records a dose is worse than a tap that takes a second longer.
Everything else is deliberately secondary: the check-in ("how are you feeling today?", three options), today's routine step by step, and the people screen with faces and names for one-tap calling.
Dignity is a design constraint
There's a failure mode in products for older adults where the interface starts to feel like a hospital wristband: cheerful, oversized, faintly condescending. We've tried to avoid it with a few rules.
The senior interface uses the same visual language as the rest of the product: the same palette, the same typography, the same calm surfaces. It is simpler, not childish. It doesn't report performance back to the person using it, because "you missed 3 doses this week" is a message for a coordinator, not a reproach at breakfast. And it never hides what's happening: if location or activity signals are on, the person can see that they are on.
A monitoring product the monitored person cannot inspect is surveillance. The senior owns the record, including the right to see what the family sees.
Accessibility that isn't a checkbox
Two settings sit behind Senior Mode. The app applies its own type-scale boost rather than depending on the person having already changed an OS preference, and most haven't. On top of that, the platform text scale is still respected, clamped so layouts hold rather than shatter at extreme sizes. An Enhanced Accessibility mode raises contrast and type further, and it's available on the senior's own home screen rather than buried three levels into settings, where a family member would have to set it for them.
Beyond type: status is never communicated by color alone. It is always an icon plus words, which matters for the substantial share of older men with color-vision deficiency. Charts elsewhere in the app carry spoken summaries so a screen-reader user gets the trend instead of a blank rectangle. Both palettes are held to WCAG AA contrast by an automated test, so a future design tweak can't quietly drop below it.
Light and dark, both first-class
Dark mode in a senior interface is not decoration. Plenty of older adults check their phone at 5 AM, and a full-brightness white screen at that hour is genuinely unpleasant. Both themes come from one token set: the same interface with a different palette rather than two code paths that drift apart. The theme picker shows three miniatures of the interface rather than the words "System / Light / Dark".
What we don't know yet
Design rules get you to a defensible starting point; they don't tell you whether the confirmation flow makes sense to someone with mild cognitive impairment on their fourth morning of using it. That's field testing, and it's ongoing. If you're caring for someone who'd be willing to try it and tell us what's wrong, we'd like to hear from you: hello@agecare.app.
AgeCare does not diagnose, screen for, or measure dementia or any other condition.