Knee pain
Knee pain and knee alignment: what a phone scan can show you
Knee pain has many causes, and no camera can tell you which one is yours. What a Libria scan can do is measure the things a physiotherapist looks at first: whether each knee drifts inward or outward when you stand (valgus or varus), how different your two knees are, how far each knee bends as you walk, and your knee flexion range of motion. Those numbers do not explain the pain, but they give you and your clinician something concrete to start from, for ₹99.
₹99 per report · No subscription
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The knee sits between the hip and the ankle and tends to take the blame for what happens at either end. A hip that drops on one side, a pelvis that tilts, or a foot that rolls in all change the angle at the knee, which is why a knee assessment usually starts by looking at the whole leg in standing and in walking.
That is what the three Libria scans do together. The posture scan measures each knee’s alignment in standing and the symmetry between them. The gait scan measures how far each knee bends with every step. The range of motion scan measures how far the knee can bend when you ask it to.
What Libria measures around the knee
Knee alignment in standing
Inward or outward drift of each knee, as a share of your leg length, from the front view. Inward drift is the "knock knee" or valgus pattern; outward drift is varus.
Knee symmetry
How different the left and right knee alignment are, in degrees.
Weight shift and pelvic tilt
Whether you stand with more weight on one leg and whether your pelvis is level, both of which load the knees unevenly.
Peak knee flexion while walking
How far each knee bends during a step, and the asymmetry between the two, from the gait scan.
Knee flexion range of motion
How far the knee bends when you bend it deliberately, each side, against a reference range, from the ROM scan.
Hip flexion range of motion
Because a stiff hip often shows up as a sore knee.
When a scan is a sensible first step
- Your knee aches after sitting, stairs or long walks, and you want to see whether it lines up differently from the other side.
- You have been told you have knock knees or bow legs and want to measure it.
- You are returning to sport or running after a knee injury and want to check that both knees are bending evenly again.
- Your physiotherapist has asked you to track your knee bend between appointments.
How a Libria scan works
- STEP 01
Open the scan on your phone
No app to install. Sign in, choose the scan type, and prop your phone where it can see all of you.
- STEP 02
Follow the on-screen guide
Three 10-second captures for posture, a short straight walk for gait, or one steady movement for range of motion.
- STEP 03
Read your measured report
Every angle in degrees against a screening band, with plain-English explanations, as a PDF you can keep or send to your physiotherapist.
What a camera scan cannot tell you
- A camera cannot see cartilage, ligaments, meniscus, swelling or arthritis. It cannot tell you why your knee hurts.
- See a doctor promptly, rather than scanning, if the knee is swollen, hot, locking, giving way, cannot bear weight, or the pain followed a fall or twist.
- Alignment in standing is one position on one day. Knees behave differently under load, on stairs and when tired.
- The screening bands are adult reference values, not diagnostic thresholds.
Questions people ask
Can an app tell me why my knee hurts?
No, and you should be wary of any that claims to. A phone camera can measure how your knee lines up and moves; it cannot see inside the joint. Libria prints measurements and reference ranges and leaves the diagnosis to a clinician who can examine you.
What is knee valgus?
Valgus is when the knee sits inward of the line between the hip and the ankle, the pattern often called knock knees. A small amount is common. Libria measures it for each knee as a share of your leg length, so the reading is fair whether you are tall or short.
Should I see a physiotherapist for knee pain?
If the pain has lasted more than a couple of weeks, is getting worse, or is limiting what you do, yes. A physiotherapist can examine the joint, test strength and movement, and give you a plan. A Libria report is a useful thing to bring to that first appointment.
Which scan should I do for knee pain?
Start with the posture scan for standing alignment and symmetry. Add the gait scan if the pain is worse when walking, and the range of motion scan if the knee feels stiff or you are recovering from an injury or surgery.
What does it cost?
A Basic report is ₹99 and a Detailed report with a full written interpretation is ₹249. Packs bring the price down to ₹200 or ₹180 per report. There is no subscription.
YOUR NEXT STEP
Measure it today. Bring the numbers to your physiotherapist.
One scan, ₹99. A Detailed report with written interpretation is ₹249. Account needed. No subscription.
Related
Last reviewed 16 September 2026. Libria is a screening tool by MyFloww. It does not diagnose, treat or replace a consultation with a qualified physiotherapist or doctor.