Field notes

Plain writing on the research, the ethics, and the design.

The thinking behind what Cairn ships. Each essay stands alone. None of them is upsell.

The science

What the science of reading actually says about phonics apps

SATPIN, decodable text, and the difference between phonics and phonics theater.

The ethics

Screen time is not the question. Screen content is.

A reframe parents can use, with the research that actually justifies it.

The ethics

Why we do not collect any data, even the boring kind

What an honest privacy posture looks like when the user is a four-year-old.

The science

What the WPPSI tests, and how kids actually build those skills

What the assessment measures, why it matters, and how a parent supports the underlying skills without test prep.

The design

Why our games look like the 90s on purpose

Lower-arousal interfaces are easier on developing nervous systems. The pixel art is not a style choice.

The story

Made by a mom: why I built Cairn

The shorter version of the founder story, with the part the bio leaves out.

The ethics

Why ads in kids apps are an ethics problem, not a UX problem

The argument from the developmental research, not the parental ick factor.

The science

Phonics in the SATPIN order, and why most apps get it wrong

Why the first letters a child learns are the difference between reading by Thanksgiving and not.

The science

Working memory in early childhood, and what every parent should know

It is the single best predictor of school readiness. It is also trainable. Here is the parent-useful version.

The design

Why we sell games once and never charge again

What buying instead of subscribing means for the design of the app, and for what kind of company we get to be.