Field-tested interfaces for the next billion
summary
Field-tested work with health teams in Nigeria Guinea Sierra Leone and DRC shows cheap Android knockoffs, intermittent networks and scarce power shape usable interfaces. Deployed tablet and phone apps for mapping and vaccination that require offline-first sync, avoid hidden selects by using wizard screens with one action per view, and prefer large tactile buttons because novices tap everything. Expect 50 Kbps connections, 2–5 hour charging cycles, lots of retries, and build confirmations, instant feedback and developer-led field testing.
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chapters (6)
- 0:00The next billion users
- 10:36Device and connectivity
- 14:24Power and interface design
- 17:10Navigation and interaction
- 22:21Animation and consistency
- 25:35Field research and takeaways
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