Safety before scores.
A quick check asks about recent knee surgery, sharp pain or swelling, and falls. If the test isn't right for you, the next step is guidance from a provider—not pushing through.
KneeAge by KneeMetric · In development
Your knees have a story.
Know the number.
Meet KneeAge: a free phone-based wellness screen in development for adults who want to keep moving. A chair-stand test turns everyday strength into a shareable knee-age estimate.
Built for active adults 40–75. A fitness screen, not a diagnosis.
Small test. Bigger perspective.
Measure strength. Stay curious.
Our commitments from day one
Your video stays yours.On-device analysis is the design goal. No video uploads.
A established test, a new interpretation.The 30-second chair stand appears in the CDC's STEADI toolkit. Our knee-age estimate still needs validation.
Evidence before big claims.We plan to compare app results with in-clinic assessments before making accuracy claims.
The movement-to-insight loop
Less guessing.
More going.
For the trail, the court, and the stairs at home. KneeAge is designed to make strength easier to understand—not to put a label on what you can do.
One score. Useful context.
The proposed estimate compares chair-stand repetitions with published age and sex norms. Form and balance may add context, subject to validation.
Test → understand → share → retest
A chair. Your phone. Thirty seconds.
The planned test uses a stable chair without wheels, a side-on camera view from 6–8 feet away, and support nearby. On-device pose tracking is designed to count complete stands and follow your pace.
Turn movement into a meaningful next step.
See a knee-age estimate, a strength, and something to work on. An optional supported balance round adds context; a four-week retest helps you follow your progress.
Persistent pain or concerns? A score cannot replace care. The planned local pathway starts with Marin Joint Health, with clinic partnerships to follow.
Access & clinic partnerships
Free to discover.
Built to connect.
The consumer test is planned to be free. Clinic pilots will explore branded experiences and booking links; licensing prices are not yet finalized. Any available checkout plans are listed below.
Free
For individuals getting started
$0/month
- 1 workspace
- Up to 3 team members
- Basic analytics
- Community support
PT or chiropractic clinic? Help shape the pilot and the path from a wellness score to a local conversation.
Register clinic interestYour next chapter is active
Stay in the game.
Start with curiosity.
Join early access for KneeAge. Be part of building a simpler way to understand your strength and find your next step.
KneeAge is in development and is intended for wellness and fitness education only. It does not diagnose conditions, assess surgical need, or replace professional advice. Do not test through pain; consult a qualified provider if you have symptoms or safety concerns.