Hadalog: Skin Condition Log
Tomorrow's skin, known today
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
Your skin moves with the weather and your habits. Hadalog turns a three-question check plus weather and health data into a picture of today and tomorrow.
Hadalog makes "why is my skin different today?" visible as an overlap of weather and daily habits. No camera, no photos of your face.
■ How it works
Tap through three questions — tightness, oiliness, unsettledness — on a five-point scale. It takes about fifteen seconds. If you own a moisture meter, you can enter its readings instead. Weather (humidity, temperature, UV, wind) and Health (sleep, steps, water, cycle) are gathered automatically for the items you allow, and treated as that day's inputs. In the evening, one tap tells the app how it actually went, and the forecast moves closer to your own patterns. After fourteen days of records, it switches from general patterns to your own.
■ Free features
・Today's skin condition index
・Today's care suggestions
・Daily entries and records (unlimited)
・Evening check-back
・Calendar and 7-day trend
■ With full access (one-time purchase)
・Tomorrow's forecast and suggestions
・Long-range trends, factor correlations, cycle phase
・PDF export
・Local backup
■ Your data
Your records and Health data never leave your device, and no account is needed. Only when fetching the weather is your location sent to Apple.
Full access is a one-time purchase. It is not a subscription — buy it once and it stays. Recording and today's index are free and unlimited.
Hadalog is a self-tracking app. It is not a substitute for medical diagnosis or care. If something concerns you and persists, please consult a dermatologist.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, YANGLI CHEN, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- YANGLI CHEN
- Size
- 6.1 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later. - Apple Watch
Requires watchOS 26.0 or later.
- iPhone
- Languages
English and 32 more
- English, Arabic, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Malay, Norwegian Bokmål, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Slovak, Spanish, Swedish, Thai, Traditional Chinese, Turkish, Ukrainian, Vietnamese
- Age Rating
13+
- 13+
- Infrequent
Medical Treatment information
Contains
Health or Wellness Topics
- In-App Purchases
Yes
- ハダログ フルアクセス $9.99
- Copyright
- © 2026 freetokyo