Cosxn

Cosxn is a practical skincare shelf tracker for oily-skin routines. It is not a social feed and not a skincare advice app. It helps you remember when a product was opened, watch freshness countdowns, and keep a simple private usage log.

Seal Pad — open-date shelf
Register cleansers, toners, serums, moisturizers, sunscreens, treatments, masks, and eye-care products with the day you opened them. Set PAO months or a fixed expiry date, attach a product photo, and keep an optional opening voice note. Your shelf shows how many days remain for each product.

Fresh Gauge — expiry countdown
View active products by urgency with clear countdown gauges and color cues: critical, soon, comfortable, and fresh. Tap a product to review its detail, or export a shelf poster to your photo library when you want a visual reminder.

Dose Log — AM/PM usage diary
Log morning and evening skincare sessions by choosing products from your shelf, adding skin-feel tags, notes, optional photos, or an optional voice reflection. Review past sessions whenever you need a simple routine history.

Dew Coins (optional)
Dew Coins are optional consumable credits for shelf poster exports, product share cards beyond free allowances, and extra archived-product restore slots. Core tracking features can be used without purchase.

Privacy
Cosxn stores product records, photos, voice memos, dose logs, and settings locally on your iPhone. No account is required. No cloud upload is used for your skincare records. Terms and Privacy Policy are available inside the app.