Your wardrobe has more outfits in it than you think.
Find looks you want to wear, then see how much of each one is already hanging in your wardrobe.
Start with your clothes

01
Find a look
Browse, or screenshot a fit from anywhere. However you found it, it comes into OOTD the same way.

02
See your version
OOTD reads the look piece by piece and checks it against what you already own — honestly, including the near-misses.

03
Fill the gap
Usually you are one piece away. Only then does OOTD suggest buying anything, and only the piece you are actually missing.
See what you can wear before buying something new.
Start with your clothes