01
One guided capture
The camera helps you keep angle and light consistent so the next check-in has something fair to compare against.
Hair wellness · not a medical device
A calm, honest record of your own hair.
Set a baseline, compare only against yourself, and keep the defaults private.
- The default request leaves your phone carrying three numbers and no photo.
- No overall score, no grade, no ranking against anybody else.
- Withdraw any one consent at any time and keep using the rest.
- Storage, research and support live behind separate switches.
Built for people who want a weekly record, not a score, and who want the defaults to stay calm and private.
9:41
Thursday, 1 August Good morning, Ravi
This week's capture is ready
Same angle, same light. About forty seconds.
Open camera Density +1.8%
Hairline position Steady
Scalp visibility −0.9%
Six days of routine, unbroken
Why it feels easy
A weekly rhythm that stays simple to read.
Keep one baseline, compare only when captures match, and manage the routine and privacy controls separately.
02
Matched comparison
Captures are only compared when the conditions line up, which keeps the timeline honest instead of confident.
03
Routine that adapts
Short morning and evening actions fit around a normal week, with reminders that help rather than nag.
04
Privacy stays split out
Storage, research and sharing are separate controls, so one choice never turns into three.
At a glance
3 measurement cards, kept as peers and never averaged
0 photos leave your phone unless you explicitly store them
4 separate consent categories, each revocable on its own
40s for a full weekly capture, from reminder to save
The three measurements
Three peers. Never a single verdict.
Each card answers one narrow question about your own photos. HairLens keeps the three measurements equal, never adds them up, and never decides for you which one matters most.
Density
How closely hairs sit together across the same patch of scalp, photo to photo.
Since your 12 May baseline +1.8%
Hairline position
Where your hairline sits against fixed landmarks on your own face.
Since your 12 May baseline Steady
Scalp visibility
How much scalp shows through, under lighting matched to your baseline.
Since your 12 May baseline −0.9%
Why there is no overall score
A single number would have to decide which of the three matters most, and that decision belongs to you and the people who advise you — not to an app. Colour here is identity, not judgement: slate, clay and sage mark which measurement you are reading, and they never shift towards red or green to tell you how to feel about it.
How it works
Four steps, then a habit.
One baseline capture, one weekly check-in, one honest timeline. No clinic, no kit, and no lighting you do not already have at home.
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Set a baseline
Three guided photos — front, crown and part line. The camera coaches the angle and the light until they match, so the baseline is actually comparable later.
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Repeat weekly
About forty seconds. HairLens tells you when a capture is due, then stays quiet until the next one, so the habit fits into a normal week.
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Read the timeline
Every figure is a change against your own baseline. Steady is a perfectly good result, and it stays labelled that way instead of being treated as a problem.
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Adjust the routine
A daily plan you can edit step by step. The streak rewards showing up, never what a measurement did, and it never resets because a photo changed.
Photos taken under lighting that does not match your baseline are flagged, not quietly compared.
Tracking
A timeline, not a verdict.
Photographs sit next to each other with the dates attached. HairLens compares only captures taken under conditions it can match, and says so plainly when it cannot.
- Side-by-side comparison against any earlier capture you choose.
- A mismatched-lighting warning instead of a confident wrong answer.
- Formula changes bump a version number, and versions are never compared.
9:41
Compare
12 May baseline
1 Aug latest
Lighting and angle matched
Change over 81 days Density +1.8%
Hairline position Steady
Scalp visibility −0.9%
Compared with your own 12 May capture. Nobody else's.
Daily routine
A routine that bends around your week.
A handful of steps in the morning, a couple at night, and a plan that quietly reworks itself when a week gets away from you.
- Every step is editable, skippable and yours to reorder.
- Adherence is counted honestly — a missed day stays a missed day.
- Streaks and badges attach to habits only, never to a measurement.
9:41
Today · Thursday Four of six done
- Rinse with lukewarm water Morning
- Gentle cleanse Morning
- Condition mid-lengths and ends Morning
- Two minutes of scalp massage Evening
- Loose tie, never while damp Evening
- Weekly capture Evening
Six days of routine, unbroken
Guidance
Answers you can trace back to something.
Care suggestions come from a reviewed library, and the coach cites the entry it drew from. When a message needs a human, it gets fixed reviewed text rather than a generated reply.
- Every suggestion names the library entry behind it.
- Your shelf is checked for ingredient conflicts, not upsold to you.
- Sensitive messages never reach a model at all.
9:41
Coach
My scalp feels tight after I wash it. Is that something I should change?
Tightness after washing usually tracks with water temperature and how long a cleanser sits. Try lukewarm water and a shorter contact time for a fortnight, and keep the rest of your routine the same so you can tell what did it.
From: Scalp comfort · reviewed 12 Mar
Ask about your routine
Four of five conversations left today.
Privacy
Your face is the most identifiable thing you own.
So the default is that it stays where it is, and the app has to earn every exception.
On your handset
The pose model runs on the phone. The default request that leaves it carries three floating-point numbers and no image at all.
Four separate consents
Capture, storage, third-party processing and research are asked for separately and withdrawn separately. Saying no to one keeps the rest working.
A ledger, not a checkbox
Consent history is append-only. Withdrawing writes a new row; nothing overwrites what you agreed to last month, and the app cannot edit it.
Deletion in two phases
Deleting records your intent, then confirms the file is actually gone. The gap between the two is tracked as an open obligation until it closes.
Export everything you have given us as one file, whenever you want, without emailing anybody.
Where the line is
Four things this is not.
Every one of these is enforced in the database, not left to copy review. They are product rules, not marketing flourishes.
- 01
Not a medical device
It does not diagnose, treat, cure or prevent anything, and it will not tell you what a change means.
- 02
Not a score
There is no overall number, no grade, no ring filling up and no leaderboard.
- 03
Not a comparison with other people
Every figure on every screen is you against an earlier you, never a population or an age band.
- 04
Not a shop front
Products exist so the app can spot conflicts between things already on your shelf.
Pricing
Two plans. No advertising in either.
The free plan is a real product, not a trial with the useful parts taken out. Plus is for people who want the fuller record and the guidance around it.
Free
$0 always
Everything you need to start a timeline and keep it honest.
- Weekly guided capture with on-device coaching
- All three measurements, side by side
- Sixty days of timeline history
- A daily routine you can edit
- Export your data whenever you want
Plus
The full record$4.99 per month, or $39 a year
For anyone who wants the full record and the guidance around it.
- Unlimited timeline history and photo comparison
- Adaptive routine that adjusts to your week
- Care guidance from a reviewed library
- Product shelf with ingredient conflict checks
- Coach conversations with cited sources
Your photos are never used to train anything unless you switch research consent on, and it ships off.
Questions
The ones people actually ask.
If the answer is no, it says no. If the app cannot know, it says that too.
Do my photos leave my phone?
Not unless you turn storage on. The pose model runs on the handset, and the default request carries three numbers and no image. If you do enable storage, the photo is encrypted, tied to your account alone, and deletable in two taps.
What happens if I miss a week?
Nothing. There is no penalty, no broken chain and no catch-up prompt. The timeline simply has a gap in it, which is honest.
Can HairLens tell me why something changed?
No, and it will not pretend to. It reports what the photographs support — a change against your own baseline — and leaves the interpretation to you and anyone you choose to consult.
Is this a medical app?
No. HairLens is a general wellness product. It does not diagnose, treat, cure or prevent any disease or condition, and the vocabulary that would imply otherwise is blocked in the database itself, not just in copy review.
What happens when I withdraw consent?
The category you withdrew stops immediately and the rest keeps working. Withdrawal writes a new row in an append-only ledger, so there is always a record of what applied when.
Which phones does it run on?
Android 10 and later for now. The capture flow depends on on-device pose estimation, so handsets that cannot run it are unsupported rather than quietly downgraded.
Start with one photo.
Set a baseline this evening. The second capture is next week, and there is nothing to read until then, which is exactly the point.
Free plan, no card, no advertising.