Culprit: Skincare Diary
Find the product to suspect
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Twenty seconds a day: list your products, tap how your skin was. After about a week it names the bottle that turns up most on your bad skin days, with the count.
Broke out and can't tell which product did it? Culprit answers one question, on your own data: which product on your shelf is the culprit?
Nothing you log ever leaves your iPhone — no cloud, no account, no face-scan AI. Every product, every skin note, every optional photo stays on your device and is read entirely on-device. Culprit's privacy label reads Data Not Collected — the thing the cloud skin-scan apps can't say.
HOW IT WORKS
You log your shelf — the skincare products you actually own and use — and keep a simple AM/PM routine. A 20-second daily note captures how your skin reacted: clear, a little reactive, or a breakout, with an optional photo for your eyes only. Culprit stays quiet for about a week while it gathers signal. After that, its on-device engine names the product to suspect — for example: "Niacinamide serum appeared on 4 of your 5 most reactive days." It is a correlation from your own logs, an observation, never a diagnosis.
Culprit is a calm, cosmetic product-reaction tracker — not a medical app. It points at a product, never at a condition, and is not a substitute for a dermatologist.
WHAT YOU GET FREE
- Your shelf of products and a simple AM/PM routine
- The 20-second daily skin-reaction note, with an optional on-device photo
- Your day-by-day log, kept privately on your iPhone
WHAT PREMIUM UNLOCKS
- The full ranked suspect read — every suspect beyond your first, ordered by how strongly it tracks your breakouts
- The pattern detail behind each suspect, so you can read the correlation for yourself
- Your full reaction history as it builds
Calm by design: no streaks, no badges, no before/after pressure, no glow-up hype. Culprit runs fully offline — no Wi-Fi needed except Apple's StoreKit for subscriptions. No third-party analytics. No sign-in. No server.
SUBSCRIPTION TERMS
Culprit offers an annual plan at $29.99/year with a 7-day free trial, a weekly plan at $4.99/week, and a one-time lifetime purchase at $49.99.
- Payment is charged to your Apple Account at confirmation of purchase.
- Subscriptions automatically renew (auto-renew) unless you cancel at least 24 hours before the end of the period.
- Your Apple Account is charged for renewal within 24 hours before the end of the current period.
- Manage or cancel anytime in Settings → Apple ID → Subscriptions.
- Any unused portion of a free trial is forfeited when you purchase a subscription.
Privacy Policy: https://hadgerapps.github.io/culprit/privacy/
Terms of Use (EULA): https://hadgerapps.github.io/culprit/terms/
From Hadger. Support, privacy, and terms at https://hadgerapps.github.io/culprit/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Vassiliy Shmigirilov, 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
- Vassiliy Shmigirilov
- Size
- 1.6 MB
- Category
- Lifestyle
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - iPad
Requires iPadOS 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.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Culprit Weekly $4.99
- Culprit Lifetime $49.99
- Culprit Annual $29.99
- Copyright
- © 2026 Hadger
