Input fit
Confirm that the tool accepts the exact assessment family and target Step exam you are using. Form names that look similar are not automatically interchangeable.
Source-checked comparison
How to Compare USMLE Score Predictors
There is no verified universal winner. Compare input fit, uncertainty, evidence disclosure, and decision value—and verify product facts at their current public sources.
Four checks that matter more than a winner badge
Uncertainty
Prefer a disclosed range and limitations over a precise-looking number with no explanation of model uncertainty.
Evidence status
Separate official product facts, internal model assumptions, user reports, and reproducible validation results. They are different levels of evidence.
Decision value
Choose the tool whose output answers a real planning question. No independent calculator should replace an official score report or institutional guidance.
Sources checked August 9, 2026
Start with each product's current public page
This is a product-information review, not an accuracy study. A feature is not evidence that a predicted score is calibrated. Unknown or unverified details stay unknown rather than being filled with assumptions.
NBMEcalcPublishes its current source adjustments, planning-range assumptions, limitations, correction history, and validation status.PredictMyStepScoreIts public homepage describes support for Step 1, Step 2, and Step 3 and names NBME, UWorld, AMBOSS, and Free 120 among supported inputs.AMBOSS Step 2 CKAMBOSS publishes its Step 2 CK study-product information on this official page. Verify current inclusions and terms there because product details can change.
For a narrower claim-by-claim review, see our source-checked PredictMyStepScore comparison.
Test the workflow, then inspect the limits
Run an estimate with fictional or your own practice values, then read what the model can and cannot support before using the result.