Best USMLE Score Predictor 2026
We compared every major USMLE Step score predictor on 12 features that matter — accuracy, multi-source support, confidence intervals, mobile UX, and trust signals. Here is the honest matrix.
Feature comparison matrix
| Feature | NBMEcalc | PredictMyStepScore | AMBOSS | nbcalc |
|---|---|---|---|---|
| NBME forms (28-32) | ||||
| UWSA 1 & 2 | ||||
| Free 120 | ||||
| AMBOSS SA conversion | ||||
| CMS Form support | ||||
| 95% confidence interval | ||||
| Personalized 14-day study plan | ||||
| Downloadable PDF report | ||||
| Mobile-optimized | ||||
| Free unlimited use | ||||
| Multi-Step tracking dashboard |
- NBME forms (28-32)
- UWSA 1 & 2
- Free 120
- AMBOSS SA conversion
- CMS Form support
- 95% confidence interval
- Personalized 14-day study plan
- Downloadable PDF report
- Mobile-optimized
- Free unlimited use
- Multi-Step tracking dashboard
- NBME forms (28-32)
- UWSA 1 & 2
- Free 120
- AMBOSS SA conversion
- CMS Form support
- 95% confidence interval
- Personalized 14-day study plan
- Downloadable PDF report
- Mobile-optimized
- Free unlimited use
- Multi-Step tracking dashboard
- NBME forms (28-32)
- UWSA 1 & 2
- Free 120
- AMBOSS SA conversion
- CMS Form support
- 95% confidence interval
- Personalized 14-day study plan
- Downloadable PDF report
- Mobile-optimized
- Free unlimited use
- Multi-Step tracking dashboard
- NBME forms (28-32)
- UWSA 1 & 2
- Free 120
- AMBOSS SA conversion
- CMS Form support
- 95% confidence interval
- Personalized 14-day study plan
- Downloadable PDF report
- Mobile-optimized
- Free unlimited use
- Multi-Step tracking dashboard
Last updated May 2026. Data sourced from public product pages. Brand names are property of their respective owners.
Who wins — and where each tool falls short
NBMEcalc (us)
Strongest at: multi-source aggregation, 95% confidence intervals, and personalized study plans.Weakest at: Pro dashboard timeline still in beta. Recommended if you need an end-to-end Step prep tool.
PredictMyStepScore
Strongest at: brand recognition, 6+ year track record. Weakest at: no confidence intervals, limited input sources, paywall before basic prediction.
AMBOSS Predictor
Strongest at: direct integration with AMBOSS SA. Weakest at: only works inside the AMBOSS ecosystem; no UWSA / NBME-only path.
nbcalc.netlify.app
Strongest at: top Google search ranking. Weakest at: dated UI, no functionality beyond a basic lookup table, no mobile version, no methodology disclosure.
Try the best one free
No signup. Multi-source aggregation, 95% CI, and a personalized study plan — all free. Go straight to the Step 1 predictor or the Step 2 CK predictor.