Comparison

EBM Stats Calc vs JournalJams

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

EBM Stats Calc

This medical app assists clinicians and educators in performing complex calculations related to evidence-based medicine. It offers tools for calculating NNTs, diagnostic test utility, and understanding the impact of pretest probability on posttest results.

Highlights
  • Calculate Number Needed to Treat (NNT)
  • Calculate diagnostic test utility
  • Pretest to posttest probability conversion
  • Positive and Negative Predictive Value calculation
  • Interactive slider for pretest probability demonstration
  • Useful for clinicians, students, residents, and educators
Features
Read full description

Occasionally in medicine, we really need to "do the math". This app will help. EBM Stats Calc let's a clinician do calculations that are hard or impossible to do in one's head. A clinician can get NNT's (number needed to treat) from rates, percentages, or raw event and patient numbers. And a clinician can use sensitivity and specificity or likelihood ratios (LR+, LR-) to go from a pretest probability to posttest probability and positive predictive value and negative predictive value. Although these calculators themselves are somewhat novel for apps, the unique tool in this app is for educators. Students and residents have a hard time understanding how the utility of a test can vary with pretest probability. Instead of saying it in words and hoping they get it, now you can demonstrate it. A test might perform well, giving good PPV and NPV, when pretest probability is in a certain range. But slide that pretest probability up or down and see the diagnostic utility change with the numbers flying right before your eyes. The tool also shows a student that in many cases, an imprecise estimate of pretest probability doesn't much matter. Different doctors might judge a clinical case to suggest likelihood of disease (pretest probability) of 40%, 50%, or 60%. The slider tool shows that the differences may not matter, and the test in mind will render good clarity regardless of differing opinions on pretest probability. The app is written for clinicians, students, residents, and especially educators, in any discipline of medicine. As a clinician and educator myself, I would be grateful for feedback to make the tool better.

About

JournalJams

This app simplifies complex medical research for healthcare professionals. It provides concise summaries, key findings, study designs, and clinical significance of medical literature. It also offers discussion guides and contextual information to aid understanding and staying current.

Highlights
  • One-sentence study summaries
  • Key findings at a glance
  • Study design and methods breakdown
  • Clinical significance explained
  • Historical context and related trials
  • Limitations and bias analysis
  • Perspective-based discussion guides
Features
Read full description

JournalJams helps healthcare professionals quickly understand medical research. Enter a study name, specific keywords, or a research question, and get: • One-sentence study summaries • Key findings at a glance • Study design + methods breakdown • Clinical significance explained • Historical context (how it fits with prior research) • Limitations and bias • Discussion guides from every perspective (Med student, Resident, Fellow, Attg, PhD, Journal Editor, and Guidelines Committee) • Related landmark trials and closely connected studies Perfect for journal clubs, rounds prep, teaching, or staying current with the literature. For educational purposes only. Not intended to replace professional medical advice. Built by physicians, for physicians. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://journaljams.org/privacy.html

Screenshots

EBM Stats Calc4 screens
JournalJams4 screens

Verdict

The call

The clearest difference is rating: JournalJams at 5.0 against EBM Stats Calc's 4.5. JournalJams also leads on update cadence (every 9 days vs every 14 months). EBM Stats Calc's advantage is in-app purchases (none vs 2) and iOS requirement (13.0 vs 15.1). On price, ratings volume, ads and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. JournalJams sells 2 in-app purchases, starting at $2.00 per month. EBM Stats Calc asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

JournalJams holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 2 and 4 respectively.

UpkeepUpdate frequency

EBM Stats Calc ships an update every 14 months, JournalJams every 9 days. The most recent releases landed on October 12, 2026 and October 25, 2026 respectively.

Scorecard5 real differences · 5 level
EBM Stats Calc versus JournalJams: the parameters behind the verdict, then further details
ParameterEBM Stats CalcJournalJams
PriceFreeFree
Rating4.5 (2 ratings)5.0 (4 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings24 — better
Update frequencyEvery 14 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.1
Further details — not scored
Size1 MB26 MB
Age rating12+17+
DeveloperJoshua D. steinbergAnnas Rahman

Customer experience

EBM Stats Calc

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

JournalJams

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

EBM Stats Calc

No in-app purchases

2 purchases

JournalJams

Subscriptions2
  • Pro Monthly$2.001 Month
  • Pro Annual$20.001 Year

Questions

Is EBM Stats Calc free?
EBM Stats Calc is free to download, with no in-app purchases.
Is JournalJams free?
JournalJams is free to download, with in-app purchases available.
Which has better reviews, EBM Stats Calc or JournalJams?
JournalJams is rated higher. EBM Stats Calc averages 4.5 out of 5 from 2 ratings, while JournalJams averages 5.0 from 4 ratings.
Do EBM Stats Calc or JournalJams have ads?
Neither EBM Stats Calc nor JournalJams shows ads.
Which is updated more often, EBM Stats Calc or JournalJams?
EBM Stats Calc ships an update every 14 months, and JournalJams every 9 days. Most recently, EBM Stats Calc was updated on October 12, 2026 and JournalJams on October 25, 2026.

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