Free · runs on your device
Jaw-corner angle from a photo
The gonial angle is where the jaw turns up toward the ear. Clinics measure it on a standardized profile. A front photo can only show a flattened version of that corner.
You still get the 2D angle from both sides, with that limit written on the result.
- Cost
- Free
- Time
- Under a minute
- Signup
- None
- Data
- Stays on device
Your photo
Add a photo to measure
Face the camera straight on, hair off the face, even light, no filter.
- 1Add your photoCamera or a file. Either stays on this device.
- 2Mapped in your browser478 landmarks find the zones. The picture is not uploaded.
- 3Your measured resultNumbers from this photo, drawn on the picture.
Add a photo. It stays in this browser.
- On-device, never uploaded
- 478 landmarks
- Free, no signup
In the app
Want a record of gonial angle, not a one-off?
Gonial angle on this page is a single reading. The app saves a scan and the routine that followed it, so the next photo has a baseline.
- Six saved scores: hydration, texture, tone, acne, pores, and redness
- A morning and evening routine built from the scan
- The same face, week after week, so a change shows up as a trend
Scan with your phone. iPhone opens the App Store. Android opens Google Play.
The science
What gonial angle measures, and how this page does it
- 01
One question, answered from this photo
Gonial angle uses the face in the frame, not a questionnaire. A rough jaw-corner angle from the front photo, where the jaw turns from the ear toward the chin.
- 02
Landmarks first, then the number
The photo is drawn to a canvas in your browser. A face landmark model marks 478 points so the measurement uses the face, not the background. Nothing is uploaded.
Three landmarks approximate the angle a side-view clinician would measure with a hand on the bone. A front photo flattens that corner, so this is a weak 2D stand-in, labeled as such.
- 03
The result on this page, and the record in the app
A rough jaw-corner angle from the front photo, where the jaw turns from the ear toward the chin.
The AISkincare app keeps a scan: hydration, texture, tone, acne, pores, and redness, then builds a morning and evening routine from those scores. This page answers once and does not store the photo.
- 04
What will throw the number off
This is a cosmetic reading of one photo on your device. Lighting, lens, and angle change the numbers. It is not a diagnosis or a clinical measurement.
A true gonial angle needs a side view or a scan with depth. Beard shadow, a hand under the chin, and a low camera all invent a sharper or softer corner.
How to read a gonial angle result
Three landmarks approximate the angle a side-view clinician would measure with a hand on the bone. A front photo flattens that corner, so this is a weak 2D stand-in, labeled as such.
Use the steps under the tool as the procedure: same light, same distance, same expression, whenever you want a second reading to mean something. The app is where a series of scans can sit next to a routine. This page is the single measurement.
A setup that makes a second photo comparable
Daylight from a window, phone at eye level, an arm's length away, hair off the zones the tool needs, no beauty filter. Tilt in the chin or a camera held low changes several face measurements at once.
If the page warns that the photo looks angled, or that a distance falls outside a usual range, retake before you act on the figure.
One photo is a point. A month is a line.
Gonial angle on a Tuesday includes the light in the room. The same check in the same window next month is the comparison that can show a change. Stacking random selfies from different rooms mostly shows the rooms.
Scan the QR code under the tool with the phone you will keep using. An iPhone is sent to the App Store and an Android phone to Google Play, so the history starts in the right store.
What gonial angle will not claim
A true gonial angle needs a side view or a scan with depth. Beard shadow, a hand under the chin, and a low camera all invent a sharper or softer corner.
This is a cosmetic reading of one photo on your device. Lighting, lens, and angle change the numbers. It is not a diagnosis or a clinical measurement.
How to use the result
- Use a photo taken by the rear camera, or by someone else, at arm's length.
- Face the light. Do not use a portrait filter.
- Keep hair off the forehead if you want the outline and thirds to settle.
Where to go from here
If one part of the result stood out, open the tool that asks only that question. Each one states its limit in the same place, and each one links back to a guide when a longer explanation helps.
- fWHRDivide cheekbone width by upper-face height using a photo that stays on your device. The ratio is a proportion, not a personality or attractiveness score.
- Midface ratioCompare the distance between your pupils with midface height. Measured from one photo on your device. Compact is a description, not a grade.
- Philtrum and chinSee how the philtrum compares with the chin segment in a relaxed photo. Measured on your device. A smile will shorten the philtrum.
- Feature profileDescribe outline, eye spacing, tilt, and lip fullness from a photo on your device. AISkincare does not match your face to a celebrity.
This is a cosmetic reading of one photo on your device. Lighting, lens, and angle change the numbers. It is not a diagnosis or a clinical measurement.