Observed arrival · 2026-08-30

JointSignal Keeps a Rheumatology Record on Your iPhone

jointsignal.app Observed source

Editorial interest 86/100 Selection signal · not a rating of the site

A rheumatoid-arthritis tracker that turns daily check-ins, joint counts, medicines, blood tests, and Apple Health data into a clinician-ready report.

Landing page captured for the 2026-08-30 issue.

Field notes

JointSignal combines subjective daily entries with read-only measurements from Apple Health, including steps, walking speed, sleep, and heart rate. Its tracking model covers all 28 joints, medication doses, blood results such as CRP and ESR, flares, and suspected side effects. The site emphasizes that missing answers remain gaps, while adherence percentages exclude unanswered doses. It also describes dated iCloud Drive backups, thirty retained without overwriting, and a three-page report for appointments.

Observed signals

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Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

$PaidCommerce or pricing visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

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