Most weather apps tell you the temperature and leave the rest to you. Fit by Weather starts from your own clothes: it builds your wardrobe from photos you have already taken, learns what you actually wear, and suggests an outfit for the day ahead.
The suggestions come from clothes you already own and already wear.
Add items one at a time, or let the app scan your photo library for pictures of you wearing a full outfit outdoors, and build the wardrobe from those.
By picking photos from different days and conditions, it sees what you reach for when it is cold, wet, or warm — not just what is in the closet.
Match the forecast against what you own, and get a suggestion you can actually put on this morning.
Photo access is yours to grant, and the library scan exists to build your wardrobe — nothing more.
Fit by Weather is a consumer app for iPhone. There is nothing to set up beyond adding your clothes, and no subscription to use it.