SIMPL vs EBM Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SIMPL
This app facilitates workplace-based assessments for medical professionals, enabling the evaluation of entrustable professional activities within medical education settings.
- Workplace-based assessments
- Entrustable professional activities
- Medical education implementation
- Professional development tracking
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SIMPL: Society for Improving Medical Professional Learning makes it feasible to implement workplace-based assessments, including assessment of entrustable professional activities, across medical education.
EBM Calculator
This app helps medical professionals quickly interpret study results. It offers calculators for effect size, diagnostic test accuracy, and post-test probability, along with lessons and tutorials on evidence-based medicine.
- Effect Size Calculator
- Diagnostic Test Accuracy Calculator
- Post-Test Probability Calculator
- Fagan Nomogram visualization
- Save, Search, and Share results
- Evidence-Based Medicine lessons
- iCloud Sync
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Built to support your appraisal of medical evidence—EBM Calculator is fast, clear, and easy to use. Effect Size Calculator • Used for studies that examine the effect of a therapy or exposure • Calculate key measures for dichotomous outcomes: ◦ Absolute Risk Reduction (ARR) ◦ Number Needed to Treat (NNT) ◦ Risk Ratio (RR) ◦ Relative Risk Reduction (RRR) ◦ Odds Ratio (OR) • Includes 95% Confidence Intervals for every metric Diagnostic Test Calculator • Used for studies that evaluate the accuracy of a diagnostic test • Calculate core statistics: ◦ Sensitivity & Specificity ◦ Likelihood Ratios (LR+, LR–) ◦ Positive & Negative Predictive Values (PPV, NPV) • Includes 95% Confidence Intervals for all measures Post-Test Probability Calculator • Used to estimate the likelihood of disease after a test result • Input Sensitivity & Specificity or Likelihood Ratios • Visualize probability changes with an interactive Fagan Nomogram Save, Search & Share • Save unlimited results for future reference • Search, sort, and filter results to quickly find what matters • Share results as a PNG—ideal for Messages, email, and clean formatting • Export results as an .ebmc file to archive or send to other EBM Calculator users • Tap an .ebmc file to import results back into EBM Calculator Lessons • Explore lessons in Evidence-Based Medicine (EBM) • Reinforce core concepts in biostatistics and study design • Search lessons by title or keyword Guided Tutorials • Step-by-step tutorials walk you through every major feature • Access from the menu in each view or from Settings iCloud Sync • Saved results sync automatically across all your devices Have questions, feedback, or suggestions? Reach out to support@ebmcalculator.com
Screenshots
Verdict
The clearest difference is rating: EBM Calculator at 5.0 against SIMPL's 4.1. SIMPL's advantage is update cadence (every 2 weeks vs every 3 months) and ratings volume (16 vs 3). On price, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
EBM Calculator holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: SIMPL has 16 ratings behind it against 3, so its average is the more settled of the two.
SIMPL ships an update every 2 weeks, EBM Calculator every 3 months. The most recent releases landed on October 5, 2026 and October 2, 2026 respectively.
| Parameter | SIMPL | EBM Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (16 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 40.0% of reviews | — |
| Number of ratings | 16 — better | 3 |
| Update frequency | Every 2 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.0 — better | 18.1 |
| Further details — not scored | ||
| Size | 37 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Procedural Learning and Safety Collaborative, Inc | David Stewart |
Customer experience
SIMPL
EBM Calculator
In-app purchases
SIMPL
No in-app purchases
EBM Calculator
No in-app purchases








