Film your run.
See what to change.
Run on a treadmill and film from the side, the front or behind. Llyr shows you one thing to change, drawn on your own body.
One phone on a stand. No pods, no sensors, no account.
Film on a treadmill
Stand your phone beside, behind or in front of the treadmill at about hip height, and run steady. Llyr shows you how to frame the shot.
Already have a clip? Import it from your gallery, trim it to the part you want, and tap Analyze.
Side-on
Where your foot lands, cadence, bounce, trunk, arms and head.
From behind
Hip drop, crossover and heel whip.
From the front
Knees caving in and arms crossing.
Overstride, measured
Llyr measures how far ahead of your hips your foot lands, scaled to your own leg length, and the angle of your shin as it touches down.
Cadence is counted in steps per minute, both feet, against a target that scales with your legs and your pace.
Find your running shoe size
Put your foot on a sheet of A4 paper and point your phone camera at it. Llyr measures your foot against the paper and recommends a size.
For running shoes it allows room in front of your toes. Brands vary, so use it as a starting point and try the shoe on.
Shoe sizing comes with a paid Llyr Pro subscription. It is not part of the free trial.
Corrections as you run
Llyr flags what repeats step after step, not one odd stride, and draws it on your own body with one short cue.
Overstride
Your foot lands well ahead of your hips. Measured against your own leg length. How to fix it
Low cadence
Your steps per minute sit low for your legs and your pace. How to fix it
Hip drop
Seen from behind, one hip dips each time you land. How to fix it
Knee collapse
A knee drifts in toward the middle as your foot takes your weight. How to fix it
Bounce
You travel up and down more than forward.
Leaning back
Your trunk tips back behind your hips.
Bent at the waist
You fold forward from the hips instead of running tall.
Arms crossing
Your hands swing across the middle of your body.
Elbows open
Your arms swing nearly straight.
Crossover
Seen from behind, your feet land on or across the middle line.
Heel whip
A heel flicks out to the side as the foot leaves the belt.
Head drop
Your head hangs forward, with your eyes on the floor.
Built for your body
Every runner is built differently. Llyr scales what it measures to your own legs, and draws each correction on your own body, in your own video.
Private by default
No account and no sign-up. Your video is processed on your phone and isn't uploaded to us.
What Llyr doesn't claim
One phone camera measures body position, not ground force or foot pressure.
It never makes claims about injury or injury risk.
Works alongside your coach
Llyr is a second set of eyes, not a coach and not medical advice. If Llyr and your coach disagree, go with your coach.
Film your next run.
Llyr is on Google Play for Android phones. Stand your phone by the treadmill and run.
Free to install. One subscription covers all four modules. The 7-day trial covers swim, ride and run analysis; Bike Fit and shoe sizing need a paid subscription.