Delivered, read, understood, acknowledged: four different things
Delivered, read, understood and acknowledged are four different states. Ask for explicit ownership and prepare a backup channel.
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Practical setup
Concrete steps to set up a phone, contacts and reminders before you actually need them.
Do fewer steps always mean more safety? Not quite
Speed, confirmation and error prevention: when a direct action helps and when SOS needs confirmation and a countdown.
Read the guideWhich words should an emergency or check-in button use?
I’m OK and I need help: binary choice, legibility, meaning and limits beside chat, calling and context.
Read the guideTremor and low dexterity: design an action people can tap
I’m OK and I need help: binary choice, legibility, meaning and limits beside chat, calling and context.
Read the guideReduced vision: contrast, text and icons in a safety app
I’m OK and I need help: binary choice, legibility, meaning and limits beside chat, calling and context.
Read the guideOne decision per screen: progressive disclosure
Showing one decision first and making detail available afterwards may reduce clutter, but it must be tested with real users, tasks, contexts and assistive technology.
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