One guided capture
The camera helps you keep angle and light consistent so the next check-in has something fair to compare against.
Private by default · processed on-device
A clearer view of your hair, one consistent photo at a time.
Build a personal baseline from a guided weekly capture. Density, hairline position, and scalp visibility stay equal, separate, and compared only with your own earlier photos.
- The default workflow keeps the photo on your phone.
- Each measurement stays separate and equally weighted.
- Storage, research, and support permissions remain independent.
- 3 peers
- Never merged
- On device
- NPU and CPU first
- Your baseline
- No population rank
Raw capture
Analysis view
Density +1.8%
vs baseline
Drag or use arrow keys
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.
Matched comparison
Captures are only compared when the conditions line up, which keeps the timeline honest instead of confident.
Routine that adapts
Short morning and evening actions fit around a normal week, with reminders that help rather than nag.
Privacy stays split out
Storage, research and sharing are separate controls, so one choice never turns into three.
Guided capture
Compare like with like, every week.
HairLens checks angle and lighting before saving a photo. The three measurements stay separate and are shown only against your own baseline.
- Pose alignment runs on the handset.
- No photo upload is required for the comparison.
Angle and light aligned
Selected capture
Local preview Crown baseline
- Density
- +1.8%
- Hairline
- Steady
- Scalp
- −0.9%
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%
Five-region detail
Explore where a compatible capture has enough information.
Frontal, left temple, right temple, mid scalp, and crown are drill-down regions—not extra measurements. Missing information is labelled unavailable rather than estimated as zero.
FrontalLeft templeRight templeMid scalpCrown
Why the three stay separate
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.
AI Care Routine Instant Generator
Build your custom scalp & hair care cadence
Select your primary scalp observation and wash habits below to calculate your tailored weekly care rhythm and photo tracking milestones.
1
Primary Scalp & Hair Focus
2
Current Wash Frequency
Recommended Protocol
Updated in real-time
Calibrated Density & Scalp Baseline Protocol
Structured cadence for weekly high-precision photo captures and gentle follicle-friendly nourishment.
01
Weekly Calibrated Capture (Sunday)
Take a 40-second guided photo at identical distance and lighting to update your density baseline.
02
Gentle Cleansing & Barrier Care (2-3x/week)
Use lukewarm water with peptide-compatible shampoo. Scan bottle ingredients to ensure no pore-clogging residues.
03
On-Device Trend Review
Review hairline position delta and scalp visibility percentage directly on your handset.
Track this routine in HairLens
Available on iOS & Android · Free to start
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
One monitoring system
Photos show appearance. Check-ins record what you noticed.
HairLens keeps photo measurements, shedding observations, routine actions, and notes on one dated timeline without turning them into one rating or claiming one caused another.
Explore the app flow Quick observation
Separate track How did shedding look today?
Less than usual Usual More than usual
Optional wash-day context helps you compare like with like. One entry never changes a routine automatically.
60 seconds
Optional count
A repeatable manual protocol
Use the same combing approach, tap once per observed strand, and compare only with your own earlier counts. No universal range is applied.
10 Aug
Shedding observation
Usual · personal observation
9 Aug
Routine activity
Two actions completed
18 Jul
Compatible capture
Three measurements updated
Events share dates for context only. HairLens does not claim that a routine or product caused a photo measurement to change.
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
General wellness only
It describes photo-to-photo changes and does not interpret causes or tell you what a change means.
- 02
Not a single rating
There is no combined 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.
A useful record without pretending to know the cause.
The default path runs alignment and measurement work on your handset. Photo storage stays optional, permissions stay separate, and every visible change remains an observation against your own compatible baseline.
- 01
On your handset
The default request can carry derived values without sending the raw photo.
- 02
Separate permissions
Capture, storage, outside processing, and research choices are reviewed independently.
- 03
Your baseline only
No population rank, age comparison, stage, or combined rating is produced.
- 04
Export and erase
Your records can be exported, and erasure stays tracked until it is confirmed.
Interpretation stays human
Review privacy details When you want interpretation, take the record to a qualified professional.
HairLens can organise compatible photos and observations. It does not explain why a change happened or decide what it means.
System Summary · AI Knowledge Brief
What is HairLens AI & How Does It Work?
HairLens AI is an on-device personal hair and scalp consistency tracker. It records three independent peer measurements — density, hairline position, and scalp visibility — from a 40-second weekly guided photo capture. Computer vision models execute directly on your smartphone hardware, keeping biometric images private by default with zero mandatory cloud photo uploads.
Three Peer Measurements
Density, hairline position, and scalp visibility remain separate and equally weighted. They are never summed, averaged, or converted into an overall verdict.
468-Point Landmark Calibration
On-device vision anchors facial bone landmarks within ±5° angular tolerance. Captures taken under mismatched angles or lighting are flagged.
Zero Cloud Photo Upload Default
Photographs remain on your handset by default. The standard sync request transmits three numeric measurements and zero image files.
Four-Category Consent Ledger
Capture, storage, third-party processing, and research permissions are controlled independently in an immutable append-only record.
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.
What can HairLens tell me?
HairLens describes visible changes between matched photographs. It does not explain causes or decide what a change means; you remain in control of any next step.
How are shedding observations used?
They stay in a separate personal history. A quick observation or optional timed count is never merged with the three photo measurements, compared with a universal range, or used to change a routine automatically.
When should I speak with a professional?
Whenever you want help interpreting a change or deciding what to do next. HairLens can organize compatible photos and observations, but it does not explain causes or decide what a change means.
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.
HairLens AI
Start with a baseline you can understand.
Explore the capture flow, see how the three measurements stay separate, and review the privacy defaults before you decide.
Explore HairLensNo mandatory photo upload, no population ranking, and no combined measurement rating.