Honest comparison
Skin analysis app or dermatologist
These are not competing products, and pretending they are does everyone a disservice. One describes how skin looks in a photo. The other practises medicine. Here is which question belongs to which.
The short answer, first, because it matters
If anything about your skin worries you, see a dermatologist. Not after a scan, not after a week of tracking. Dermly gives cosmetic observations about appearance only. It is not a medical device, it does not diagnose, it does not treat, and it is no substitute for a visit to a doctor. That limit is not fine print here; it is the point of this page.
Side by side
| Question | Dermatologist | Dermly |
|---|---|---|
| Anything medical at all | The only correct address. Examination, history, tests, treatment. | Out of scope entirely. The app will not attempt it. |
| Physical examination | Touch, magnification, specialised lighting, the whole skin surface. | One compressed photo of a face, from a phone lens. |
| Your history and medications | Asked, recorded and taken into account. | Unknown. There is no account and no record to consult. |
| Prescription treatment | Available where it is warranted. | None. Only category level suggestions such as cleanser or SPF. |
| How often you can do it | As often as you can get an appointment. | Weekly, at home, in about a minute. |
| Consistency of the read | Expert judgement, which reasonably varies between visits and clinicians. | Fixed scoring: the same photo always returns the same numbers. |
| Cost | Appointment fees, insurance, waiting time. | Free to download. Full results need a subscription. |
| Record between appointments | Whatever you remember and report. | A weekly photo timeline and score history kept on your phone. |
Where the doctor wins, plainly
Almost everywhere that counts. A photograph loses depth, texture under the surface, colour fidelity and everything a hand can feel. It carries no history: no medication list, no family background, no account of what changed last month. And it cannot ask you a single follow up question. A dermatologist has all of that plus years of training, and can act on what they find. An app has a JPEG.
There is also a failure mode worth naming: an app that sounds confident can talk somebody out of an appointment they needed. That is the reason Dermly stays inside the cosmetic question and repeats the boundary on every screen rather than burying it in the terms.
Where an app is genuinely useful
- Frequency. Nobody gets a professional opinion every Sunday. A weekly self scan is possible and free of scheduling.
- A stable yardstick. Fixed scoring means the instrument does not drift, so a change across twelve weeks came from your skin.
- Memory. A photo timeline plus seven numbers per week is a better record of a quarter than recollection is.
- Following through. A checklist, a streak and an evening reminder move a routine from intention to habit, which is where most skincare actually fails.
Comparison questions
Can a skin analysis app replace a dermatologist?
No, and no honest app will claim otherwise. A dermatologist examines your skin physically, takes a history, can order tests and can prescribe. An app reads a photograph and describes how the surface looks. Those are different activities with different evidence behind them. Dermly is built for the cosmetic question only, and it says so on every screen.
When should I stop using an app and book an appointment?
Whenever something on your skin worries you. That includes anything that changes, anything that hurts or itches persistently, anything that bleeds, anything that will not heal, any sudden reaction, and anything you find yourself checking repeatedly. Do not spend a week scanning it. Book the appointment.
What is a skin analysis app actually good at?
Three things a clinic is not set up for. Frequency: you can scan weekly, which no appointment schedule allows. Consistency: the same photo always returns the same numbers, so week to week comparison is stable. Cost: it is free to download and needs no account. Within the cosmetic question it is a decent instrument, and outside it, it is nothing.
Is Dermly useful if I already see a dermatologist?
It can be, in a narrow way: a weekly photo timeline and a set of cosmetic scores taken under consistent conditions is a better record of the months between appointments than memory is. Bring it as a record, not as a second opinion, and let the doctor decide what it is worth.
Does Dermly diagnose anything?
No. It is not a medical device and it performs no diagnosis of any kind. It produces cosmetic and aesthetic observations about how skin looks in a photograph, plus general category level routine suggestions. Anything medical belongs with a qualified professional.
For the cosmetic question only. For everything else, book the appointment.
Track the cosmetic part between appointments
Dermly is free to download on the App Store. No account, no email, no sign up. Available in 11 languages.
More on reading your own skin
What your skin score means
The seven cosmetic dimensions Dermly reads, and how to make sense of each number.
Skin age test
What an AI skin age estimate is, what it is not, and why it moves between photos.
Build a skincare routine
A four step AM and PM routine at the category level, without a 12 step shopping list.
Track skincare progress
How to photograph and measure your skin so a twelve week change is actually visible.
Where your selfie goes
The honest answer: a server, once, then gone. Written out step by step.