The founder
I'm Warren Chan, a physician. I'm a dermatology resident at Mount Sinai in New York, currently on leave building health software, including this app, before returning to finish my training. Itch Log comes directly out of clinic: the visits that went well were the ones where somebody had written things down.
When I ask someone with eczema when it last flared and what they were using at the time, the usual answer is that they can't remember. That's normal. I wouldn't remember either. But visits go better when the answers are written down somewhere, and that's all this app is for.
What Itch Log is
An iPhone app for adults with eczema, planned for late 2026. A flare log that takes about ten seconds a day: severity and itch on 0 to 10 scales, triggers and treatments as single taps, guided photos if you want them. A short weekly check-in. And the part the whole app exists for: a one-page visit report laid out like a clinical document, so your dermatologist can read your last three months at a glance.
Logging, photos, and your history will be free, without caps. The visit report and trend summaries will be paid.
What it deliberately is not
- Not a diagnosis tool. Itch Log tracks and summarizes what you record. It does not diagnose, score your skin with AI, or recommend treatment. Those calls belong to you and your clinician.
- Not social. No feed, no community, no sharing your skin with strangers.
- Not an engagement machine. No streaks, no badges, no guilt when you skip a day. The app serves one appointment at a time.
How we handle your data
Photos of your skin are health data and get treated that way: consent before anything is collected, no ads, no selling data, and deletion that actually deletes. The full privacy policy will be published before the beta opens.
Writing on this site
The guides here are written by me and held to a simple rule: every claim has to be literally true, including the ones about competing apps. Start with how to track eczema flares, or if you're an EczemaWise user, the shutdown guide.