Why is my credit score different on every app?

There are over 28 different FICO scoring models and 4 different VantageScore models in active use. Credit Karma uses VantageScore 3.0 from Equifax and TransUnion. Your auto lender uses FICO Auto Score 8. Mortgage lenders use FICO 2, 4, and 5. That's why every app shows you a different number. Here at Credisure Fix, we focus on improving the underlying credit data, which raises every score across every model.