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About

Calm by design, open about the maths

Gallen started with a simple wish: to read your own device's data on your own phone, and understand what the numbers mean.

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Our story

Why Gallen exists

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What we can say today: Gallen works out its scores on the phone, keeps raw data there, and publishes every formula it uses.

The name

Named after a careful observer of the body

Galen of Pergamon · born 129 AD, died c. 216 AD

Galen was a physician, surgeon and philosopher in the Roman Empire, born in Pergamon in September 129 AD. The year of his death is debated; around 216 AD is the most cited.

At 28 he became physician to the gladiators in Pergamon. He relied on direct observation and dissection, and his writing shaped Western medicine for more than 1,300 years.

Gallen borrows only the idea: notice the signs your body already gives, and look at your own data carefully. It is not a medical tool, and the name implies no medical authority or endorsement. The double-l spelling, Gallen, is our own.

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Principles

What we hold to

Five rules that decide what goes into the app, and what stays out.

  • Calm over alarm

    Plain words and soft colours. No streaks to protect, no red alerts for an ordinary day.

  • On your phone first

    Scores are worked out where your data already is. Everything else is optional.

  • Open about the maths

    Every formula and constant is written down, with where it came from.

  • Honest about limits

    Estimates are labelled as estimates. Nothing here is medical advice.

  • Independent

    Gallen is not affiliated with or endorsed by any wearable maker.

  • Your data, your call

    Export it, back it up, or delete it, whenever you like.

Team

The people behind Gallen

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Be among the first to try Gallen

Android first, iOS later. One email when it is ready, and nothing else.

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