Find out what your gait
says about you.
In 20 seconds, with just your phone. Hold it, walk normally, and its motion sensor reads your cadence, steadiness, and left/right symmetry — one of the most information-dense health signals your body produces. Computed transparently on the device, nothing uploaded. A screening signal, not a diagnosis.
Ready when you are
For the cleanest read, put the phone in a front pocket — it's steadier than your hand (arm swing adds noise), and it's exactly how your iPhone already measures walking speed. Then tap start and walk at your normal pace across a clear, level space. Have something to hold onto nearby if your balance is uncertain.
sensors Walk normally…
reading motion…
Your walk
DEMO — simulated data, not your real motion
lightbulb What this means
Computed entirely on your phone — the private, on-device era Apple Intelligence is built for. Nothing about this walk ever left your device.
Have an Apple Watch? The Apple Health import reads months of your walking-steadiness history the same private way — in your browser, never uploaded.
How the walk test works
Reads your motion
Your phone's accelerometer samples ~50 times a second while you walk — three axes of real motion, the same signal wearable-motion foundation models are trained on.
Finds each step
A transparent signal-processing pipeline detects each heel strike, then measures the rhythm between steps and how evenly your left and right sides move. No black box.
Stays on your phone
Everything runs in your browser. Your motion data is never sent anywhere — no account, no upload, no server. You own the record.
Why gait is worth measuring
How you walk is one of the most information-dense health signals your body produces. Slower, less steady, or more asymmetric gait tracks with fall risk, recovery after surgery, and neurological change. Gait speed alone is a validated predictor of survival in older adults (Studenski et al., JAMA 2011), and open research now shows a single wrist-motion model transfers across activity, gait, and disease tasks (Inertia-1, UCLA/Duke/Johns Hopkins, 2026). It's objective enough that surgeons now implant a sensor to capture it — the FDA-authorized Persona IQ smart knee streams these same gait metrics as a reimbursable recovery signal, and a 7,861-patient study found a phone's step count tracks what the implant measures (the method & evidence). This tool reads that signal on the phone already in your pocket — for free.
This is a wellness screening tool, not a medical device and not a diagnosis. A phone in your hand or pocket is an approximate sensor; results vary with how you carry it, your walking surface, and your shoes. Gait speed shown here is an estimate, not a measured value. Do not use these numbers to start, stop, or change any treatment. If you are worried about your balance, walking, or a fall, talk to a licensed clinician. Stop immediately if you feel dizzy or unsteady.