Sunscreen, dialed in for your skin.

Real-time UV index, your personal SPF, and reminders that know exactly when to reapply — based on your skin tone, not a one-size-fits-all rule.

Download on the App Store How it works

On-device skin scanning · No images leave your phone · No tracking

skintone.uv app — skin tone classification with the Monk Skin Tone Scale — Pl. I The skin profile, revealed.
Monk Skin Tone Scale, on-device.

Chapter I

Protection that actually adapts to you.

skintone.uv combines on-device skin classification, real-time UV, and your burn profile into one personalized plan.

Monk Skin Tone classification

10-level Monk Skin Tone Scale, with on-device face detection through Google ML Kit. Inclusive, accurate, private — no photo ever leaves your iPhone.

Live UV from Open-Meteo

Real-time UV index and hourly forecast for your exact location, fed by the Open-Meteo open weather API.

Personalized SPF

Your Monk tone + Fitzpatrick burn profile + UV sensitivity score → the SPF that's right for *your* skin, not the average.

Smart reminders

UV alerts when the index crosses your threshold and reapply reminders timed by your SPF and the live UV — not a fixed two-hour rule.

Tanning, done safely

Best-time-to-tan windows by UV and skin type. Build a routine, follow it with iOS Live Activities, log progress photos.

Home Screen widgets

UV index and your next reapply time at a glance, right on your Lock Screen and Home Screen.

Sunscreen advice is calibrated for an average that doesn't exist. Your skin is not an average.

— A note from the makers

Chapter II

Three steps. Two minutes.

Set it up once. After that, just open the app or check the widget.

Step 1
Scan your skin tone

Take a selfie or pick from your gallery. Face detection runs locally; we sample your skin pixels and place you on the Monk scale (1–10). The photo is discarded immediately.
Step 2
Tell us how your skin reacts

A short Fitzpatrick check — burns easily, tans gradually, never burns — so we can calibrate your UV sensitivity score.
Step 3
Get your personalized plan

Real-time UV for your location, your recommended SPF, and reapply timing baked into reminders, widgets, and Live Activities.

Chapter III

Your face never leaves your phone.

Face detection runs on-device through Google ML Kit. Your selfie is saved locally as your profile picture — only on your iPhone, never uploaded. Replace it any time by re-scanning, or remove everything by deleting the app. No servers, no analytics, no third parties.

Read the full privacy policy →

Chapter IV

Ready to actually use the right SPF?

skintone.uv is free to try with a 3-day trial. Available on iPhone.

Download on the App Store