The Gait Check · free

Find out what your phone has been hiding all this time.

For years, your iPhone has quietly logged how you walk — speed, steadiness, symmetry — and never once shown it to you. Two ways to finally see it, both on your device: take a 20-second walk test right now, nothing to install — or bring your Apple Health export for the full 6-month trend. Nothing uploads. Nothing is stored.

Take the 20-second walk test →

100% ON-DEVICE  ·  NOTHING UPLOADS  ·  NOTHING STORED  ·  NO ACCOUNT

Two minutes, on the phone

How to get the export

Open Health

On the iPhone (yours, or the parent you're checking on), open the Health app and tap the profile picture, top right.

Export All Health Data

Scroll down, tap "Export All Health Data," and wait — big exports can take a minute or two to prepare.

Save the zip

Save to Files (or AirDrop it to this device). It's called export.zip — hundreds of MB is normal; this page streams it.

Drop it below

Come back here — on the same phone or any computer — and choose the file. The reading takes seconds.

Drop the export.zip here — or tap to choose
Accepts export.zip or an unzipped export.xml · processed locally, never uploaded
Reading…
This is a sample report built from synthetic data — run your own export above to see yours.
Your gait check

The reading

— m/s
—

Walking speed — daily average, last 6 months

Each dot is a day. The dashed line is the 90-day trend. Shaded zones are the published risk bands.
How this is computed (the whole formula, in the open)

Everything below runs in your browser — the export is parsed on your device and never transmitted.

  • Daily averages. All walking-speed samples in the export are averaged per day (units normalized to m/s).
  • Your number. The mean of your last 14 days with walking data.
  • Bands. <0.6 m/s high-risk · 0.6–1.0 elevated · 1.0–1.2 functional · ≥1.2 community-strong — from the gait-speed literature (Studenski et al., JAMA 2011; Fritz & Lusardi 2009; CDC STEADI).
  • The trend. A least-squares slope over your last 90 days, expressed as change per 90 days. A decline of 0.05 m/s is a small meaningful change; 0.10 m/s is substantial (Perera et al., 2006).
  • The flag. Steady = no meaningful decline · Watch = small meaningful decline (≥0.05) · Slipping = substantial decline (≥0.10). Apple's own Walking Steadiness notifications (Low / Very Low), if present in the export, escalate the flag.
  • Secondary signals. Walking asymmetry, double-support time, and step length shown with their 90-day change — rising double support and asymmetry are instability signals.
About the Gait Check. This tool reads walking metrics from an Apple Health export you choose, entirely on your device — the file is never uploaded, transmitted, or stored, and this page makes no network requests with your data. One optional exception, always your explicit choice: if you sign in and press “Save this result to my ComfortCard,” only the summary numbers on this report (speed, trend, gait age — never the export file) are stored to your own ComfortCard record. It is educational: not a medical device, not a diagnosis, and it cannot predict or prevent every fall. Reference bands and thresholds reflect published gait-speed research (Studenski et al., JAMA 2011; Perera et al., 2006; Fritz & Lusardi 2009; CDC STEADI). Walking Steadiness, Apple Health, and iPhone are trademarks of Apple Inc.; HealthGait is independent and not affiliated with, sponsored by, or endorsed by Apple. Always involve a qualified clinician in care decisions.