MoleDiary

The mole you noticed last spring — what size was it?

MoleDiary is a private journal for your skin. Mark each spot on a body map, record what you observe — size, color, shape, photos — and when something you recorded changes, it's easy to see. So you never have to answer "how long has that been there?" from memory again.

How it works

Three small habits, one clear history

1

Mark it

Tap the body map to place each spot exactly where it is — down to a single finger or toe, with anatomical left/right labeling.

2

Record it

Note the size, color, shape, and border you observe, add a photo, and record how long it has been there — even "since birth."

3

See what changed

Check in whenever you like. If your records differ over time, MoleDiary highlights it — 4 mm → 6 mm — and your skin report organizes everything head to toe, ready to show anyone you trust.

Why I built this

"How long has that been there?"

Working in dermatology as a nurse practitioner, I asked patients the same two questions every day: How long has this been here? and Has it changed? Almost everyone answered from memory — a shrug, a guess, a "maybe a year?" Not because they didn't care, but because nobody keeps notes on their own skin.

MoleDiary is the notebook I wished every patient had: a private place to write down what you see and when you saw it, so your own history is there when you want it. It doesn't examine anything and it doesn't replace anyone's doctor — it just means that whenever those two questions come up, you have answers instead of guesses.

— Nackyoung Yoon · MSN, RN, AGNP-C · U.S. Army veteran

Privacy

Nothing leaves your device

MoleDiary has no account, no cloud, no analytics, and no ads. Every record and photo is stored only on your own phone. If you choose to share your skin report, it sends text you approve — photos always stay private.

  • No sign-up, ever
  • No data collected or transmitted
  • Deleting the app deletes everything

Read the full privacy policy

What MoleDiary is not

A journal, not a doctor

MoleDiary does not examine your skin, analyze photos, or detect, screen for, diagnose, or monitor any medical condition. It never tells you whether a spot is normal or abnormal — it only keeps your own observations organized. Always consult a licensed healthcare professional about any changes in your skin.