Aysa App Review: AI Skin Condition Checker Tested Against the Evidence

Aysa is a free skin symptom checker from VisualDx: photograph a rash, answer a few questions, and it returns a list of conditions that could match, drawn from a clinical image library covering about 200 skin conditions. In a 2024 study of 700 patients, it put the right condition somewhere in its list 95% of the time, ranked it first 71% of the time, and missed most skin cancers.

That makes Aysa useful for one job: turning "what is this?" into a short list you can read about and take to a clinician. Below we cover how the app works, how it ranks its suggestions, what the published accuracy data shows, what it costs, whether it links to telehealth, and the signs that mean you should skip the app and get seen.

Is there a better alternative?

If your question is about everyday skin rather than a condition, Pori is our pick, and we make it. Pori (iPhone, iOS 17+) reads a selfie and returns a 0–100 skin score with breakdowns for Hydration & Moisture, Pores & Texture, Pigmentation & Tone and Anti-aging & Elasticity, plus a skin-age estimate, and its Pro ingredient scanner flags each ingredient in a product as beneficial, use with caution or avoid for your skin type. Pori is not a medical device and doesn't diagnose rashes or check moles. If you want to know what a new rash might be, Aysa is one of the better-documented free options, and a clinician is better still. For spots and moles in Europe, CE-marked apps such as Skinive and SkinVision exist; see our Skinive review and our roundup of skin condition identifier apps.

What is Aysa and who makes it?

Aysa is the consumer app of VisualDx, a clinical decision support tool that, according to Aysa's website, physicians have used for more than 20 years. The App Store listing names Logical Images as the seller and says Aysa is "built on the resources of VisualDx," whose curated library holds more than 120,000 medical images. The app covers 200 skin conditions and shows what each can look like at different stages.

The basics, from the US App Store as of October 2026:

• Price: free, with no in-app purchases listed. The listing notes that the app contains advertising.
• Rating: 4.6 out of 5 from 392 ratings.
• Requirements: iOS 16 or later on iPhone and iPad. Aysa's site says it is also on Android.
• Age rating: 16+, because of frequent medical treatment information and infrequent nudity (skin conditions can appear anywhere on the body).

How does Aysa work?

Aysa works in three steps: photo, symptoms, matches. Its how-it-works page lays them out like this:

1. Take a photo of the area that concerns you. The App Store listing says you can also select your skin color during the workflow, and that the image library includes all skin types.
2. Enter your symptoms, such as itching, pain or how long the problem has been there.
3. Review possible matches, each with photos of the condition and information about it.

Aysa says its guidance draws on the experience of more than 47,000 physicians and nurses, and the listing says its recommendations are "based on best available evidence," with content drawn from sources such as PubMed, the CDC and the WHO. You can create a profile for each family member; Aysa's privacy page says those profiles exist only in the app on your device, that photos and case information are not stored on Aysa's servers, and that photos taken in the app are not saved to your camera roll. The App Store listing adds that images are encrypted in transit to the machine learning model and discarded after analysis.

How does Aysa rank possible conditions?

Aysa gives you a ranked list of possibilities, not a single answer, and the order matters. In the 2024 JMIR Dermatology study run at a dermatology clinic in India, the app showed eight differential diagnoses per case, and researchers checked where the dermatologist's clinical diagnosis fell in that list.

In plain terms: read the whole list, not just the first result. The right answer was often in second or third place. The study authors also note that the type of neural network behind Aysa is not disclosed, so how it weighs your photo against your symptom answers isn't public.

Aysa's own site is clear about what the list is. It says Aysa "does not diagnose skin conditions" and gives you information to discuss with a healthcare professional. Treat every match as a possibility to check, never as a diagnosis.

How accurate is Aysa?

Aysa did well on common rashes and infections and poorly on skin cancer. The same study broke results down by condition group:

Individual results varied just as much. Acne was ranked first 93.2% of the time and vitiligo 97%. For skin cancers, the app was wrong most of the time: 76.9% of basal cell carcinomas were labeled as melanoma. The authors conclude that "the app is unreliable at detecting photodermatoses and malignant tumors" and that further improvement might be needed before it is used in clinical practice.

Keep the study's limits in mind too. It was a single clinic, all participants had Fitzpatrick skin types III to V, only 46 of the roughly 200 conditions Aysa covers were tested, some groups were small (20 malignant tumors), and photos were taken in a clinic rather than by patients at home. Results from your own phone, in your own lighting, could be better or worse. For more on why lighting and angle move results, see is AI skin analysis accurate.

Is Aysa free?

Yes. As of October 2026 the US App Store lists Aysa as free with no in-app purchases, and the listing notes that it contains advertising. There is no subscription to cancel and no account to create. Check the listing before downloading, since pricing can change.

Does Aysa connect you to a doctor or telehealth?

Not directly, based on what Aysa publishes. Neither the App Store listing nor askaysa.com mentions a built-in video visit, and we found no mention of VSee or any other telehealth company on Aysa's pages as of October 2026. If you searched "Aysa VSee," that pairing isn't something Aysa itself describes.

What Aysa does say is that it helps you "prepare for your practitioner visit." Its partners page adds that employers, insurers and other healthcare organizations can offer the app to their members, integrate it into existing healthcare offerings or white-label it, with the aim of helping people reach "the appropriate level of care." So some people may meet Aysa inside a health plan or employer benefit. Separately, VisualDx sells its clinician product to telemedicine platforms for use at pre-visit intake, triage or during a virtual visit; that is a tool for the doctor, not a patient feature in Aysa.

If you want a dermatologist to look at your photo, you'll need a separate teledermatology or online dermatology service. A 2023 meta-analysis of 44 studies found that diagnoses made remotely by dermatologists agreed with in-person diagnoses about 71% of the time, so even a human reading photos has limits.

When should you skip the app and see a doctor?

Skip the app and get medical care when a rash comes with any of the warning signs the American Academy of Dermatology lists in its rash guide:

• A rash over most of your body
• A rash that blisters or turns into open sores or raw skin
• Fever or illness with a rash
• A rash that spreads rapidly
• A painful rash
• A rash involving the eyes, lips, mouth or genital skin
• Signs of infection: pus, yellow or golden crusts, swelling, warmth or an unpleasant smell

Trouble breathing or swallowing, or swelling of the eyes or lips, needs emergency care right away. A shingles rash on the face is a medical emergency because it can affect eyesight, and the AAD says antiviral medicine taken within 3 days of the rash eases symptoms and lowers the risk of lasting nerve pain. A rash that doesn't fade when you press a clear glass against it can be a sign of meningitis, according to the NHS, and needs emergency help, especially with fever, headache or a stiff neck. For a mole or spot that is new, changing, itching or bleeding, see a dermatologist rather than relying on Aysa, given its weak skin cancer results. Our mole checker guide explains what those apps can and can't do.

Who should use Aysa?

Aysa suits a specific moment: a rash appears and you want to know whether it looks like something common, what to read about, and what to ask when you see someone. That matches how Aysa describes itself, as a way to screen your symptoms and prepare for a practitioner visit.

• Strengths: free; backed by a clinical image library used by physicians; ranked list of possibilities with photos and background reading; photos not stored on its servers; family profiles kept on the device.
• Weaknesses: the first suggestion is wrong about 3 times in 10 in the only independent study we found; very poor on skin cancer; contains ads; no built-in way to reach a clinician.

Use it to narrow the field, read about the possibilities, and bring the list to a clinician. If you're comparing it with apps that score how your skin looks rather than what's wrong with it, our AI skin analysis app comparison covers the other side of the market.

We did not test Aysa hands-on. This review is based on Aysa's App Store listing and website, checked in October 2026, and the published study linked above. Nothing here is medical advice.