FICO vs VantageScore, Explained
Two models, same goal
FICO and VantageScore both turn your credit report into a 300 to 850 number, and both care most about paying on time and keeping utilization low. They are built by different companies with slightly different formulas, so the same report can produce different numbers on each.
Why your scores differ
Beyond the two models, you have many scores: each bureau holds slightly different data, and there are multiple FICO versions for different products (a card score, an auto score, a mortgage score). So a free app showing a VantageScore can differ from the FICO a lender pulls. Treat any single number as a directional estimate, not an exact figure.
Which one matters
Most lenders, including the major card issuers, use a FICO score, so that is the number that usually decides approvals. Free VantageScores are still useful for tracking your trend over time, since both move together when you build good habits. Focus on the habits in how credit scores work, not on chasing one model.