How StrandMetrics works
StrandMetrics provides photographic hair observations and tracking, not medical diagnosis or treatment.
What StrandMetrics does
StrandMetrics helps you take consistent photographs of your hairline, temples, mid-scalp and crown, keep them in one place, and compare how they look over time. Your treatment calendar is a personal record of what you've told us you use.
What it doesn't do
- It doesn't diagnose hair loss or any medical condition.
- It doesn't identify the cause of changes you notice.
- It doesn't recommend, prescribe or adjust any treatment.
- It doesn't replace a GP, pharmacist or dermatologist.
StrandMetrics AI
With your consent, the photographs in a Hair Check and the Hair Check details are sent to OpenAI, our AI provider in the United States. It returns a written description of what's visible in each area, feedback on photo quality, and a comparison with your earlier photographs. OpenAI doesn't use them to train its models.
AI descriptions are automated and can be wrong. Lighting, angle, camera and hair styling all affect what's visible. They describe photographs, not your health.
StrandMetrics Expert
Your photographs are reviewed by a hair assessment reviewer with a science background and experience in the hair transplant industry. This is a non-clinical photographic review, not a medical diagnosis.
Your review describes what's visible in your photographs: hairline, temples, mid-scalp and crown, and changes since earlier Hair Checks. It doesn't diagnose causes or medical conditions, and it doesn't recommend or prescribe treatments.
Your reviewer only sees the Hair Check photographs and questionnaire answers you submit for a review, and only after you give consent on the questionnaire.
Reviews are counted in 12-month periods from your Expert start date. Each review becomes available on its 3-month date and must be used within the 12-month period it belongs to. Unused reviews expire at the end of that period, and any you haven't used end if your Expert subscription ends.
£14.99 a month, including StrandMetrics AI. Renews monthly until you cancel in Settings or the billing portal.
When to see a GP
Speak to a GP, pharmacist or dermatologist if you notice sudden or patchy hair loss, scalp pain, redness, scaling, sores or scarring, or if you're worried about your hair or a medicine you take. Don't wait for a Hair Check or an Expert review.
Your consents
Storing your photographs, AI analysis and Expert human review each have their own consent. You can withdraw any of them in Settings → Privacy & Data.
- Withdrawing AI analysis consent: New AI analyses and comparisons stop. Your photographs, Hair Checks and earlier results stay in your account.
- Withdrawing Expert review consent: You won't be able to submit new Expert reviews, and a review that's in progress pauses until you give consent again. Reviews already delivered stay in your account. Your Expert subscription and any remaining assessments are not changed.
Your data
You can export a complete copy of your data in Settings → Privacy & Data. It may include historical automated estimates (for example Norwood stage or pattern screening) from earlier versions of StrandMetrics. These were estimates of photographic appearance, not medical diagnoses, and they are no longer shown in the app.