Bayes' post vs Littmann Learning
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Bayes' post
This medical app calculates the probability of a disease after a diagnostic test. It uses pre-test probability, test sensitivity, and specificity to determine post-test probabilities for both positive and negative results.
- Calculate post-test probability
- Input pre-test probability
- Use test sensitivity
- Use test specificity
- Analyze positive results
- Analyze negative results
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Bayes’ post-test probability calculator, an iPhone / iPod touch application, calculates the post-test probability of diseases from pre-test probability and sensitivity of the test and specificity of the test. positive result: post-test probability for positive result negative result: post-test probability for negative result
Littmann Learning
This app provides access to real patient heart and lung sounds for auscultation education. It offers visual and audio displays, self-paced learning modules, and background reading material to help users recognize various heart and lung sounds.
- Real patient heart and lung sounds
- Visual and audio displays
- Self-paced learning modules
- Graduated learning difficulty
- Background reading material
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Littmann® Learning, powered by eMurmur®, is a mobile app for cardiac and pulmonary auscultation education. Built for students, educators, and clinicians, it gives you access to real patient heart sounds, lung sounds, and guided learning modules – available anytime, anywhere. Train your ear and strengthen your stethoscope skills with a rich library of high-fidelity recordings and interactive lessons designed to improve stethoscope auscultation and clinical listening confidence. Whether you are learning the basics or refining advanced listening skills, Littmann Learning helps you recognize and distinguish normal, benign, and pathological heart and lung sounds. Compare healthy and abnormal findings, reinforce pattern recognition, and build confidence for the classroom, simulation lab, and clinical practice. Build confidence with heart and lung sound recognition. Learn cardiac and pulmonary auscultation with Littmann Learning. Littmann Learning includes a library of curated heart and lung sounds, including: * A range of normal heart sounds * Abnormal heart sounds, including systolic, diastolic, and continuous murmurs * Key pathologies like aortic stenosis, aortic insufficiency, mitral insufficiency, mitral stenosis, hypertrophic cardiomyopathy, ventricular septal defect, atrial septal defect, patent ductus arteriosus, or tetralogy of Fallot * Additional sounds such as clicks, splits, S3/S4, PAC/PVC * A range of normal lung sound recordings * Abnormal lung sounds, including crackles, wheezes, and rhonchi Learn by listening and by seeing. Visual tools such as phonocardiograms and sound displays help connect what you hear through the stethoscope with the underlying acoustic patterns, making it easier to identify important cardiac and pulmonary findings. Littmann Learning is designed for anyone learning heart and lung auscultation, including: nursing students, medical students, interns, residents, fellows, physicians, nurses, PAs, or EMTs. DISCLAIMER: THIS APP DOES NOT PROVIDE MEDICAL ADVICE OR IS AN ATTEMPT TO PRACTICE MEDICINE. The information including but not limited to, text, graphics, images and other material contained on this app are for informational purposes only. No material on this app is intended to be a substitute for professional medical education, advice, diagnosis or treatment. –- Available in-app purchases Subscription titles, content and length: * Basic Monthly — Access to Listening modules for 1 month. * Semester Pass — Full access for 6 months. * Annual Pass — Full access for 12 months. Payment will be charged to iTunes Account at confirmation of purchase. Type of subscriptions: Auto-renewable. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Account will be charged for renewal within 24-hours prior to the end of the current period; the cost for renewal is the same as the initial charge. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user’s Account Settings after purchase. ---- Privacy Policy: https://www.solventum.com/en-us/home/legal/website-privacy-statement/ Terms of Use: https://info.littmann-learning.com/legal/learning/en/tou_littmann_learning.html
Screenshots
Verdict
The clearest difference is rating: Littmann Learning at 4.9 against Bayes' post's 3.7. Littmann Learning also leads on update cadence (every 6 weeks vs every 23 months) and ratings volume (850 vs 3). Bayes' post's advantage is in-app purchases (none vs 11) and iOS requirement (9.0 vs 15.6). On price, review sentiment, 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
Both are free to download. Littmann Learning sells 11 in-app purchases, starting at $3.99 per month. Bayes' post asks for nothing beyond the download.
Littmann Learning holds the better App Store score, 4.9 against 3.7. That said, the two scores are not equally well evidenced: Littmann Learning has 850 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 50% of Bayes' post's written reviews are positive against 48% of Littmann Learning's, so the app with the better star average is not the one people write more warmly about.
Bayes' post ships an update every 23 months, Littmann Learning every 6 weeks. The most recent releases landed on October 2, 2026 and October 16, 2026 respectively.
| Parameter | Bayes' post | Littmann Learning |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (3 ratings) | 4.9 (850 ratings) — better |
| Positive reviews | 50.0% of reviews — better | 47.6% of reviews |
| Number of ratings | 3 | 850 — better |
| Update frequency | Every 23 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 20 MB | 19 MB |
| Age rating | 12+ | 17+ |
| Developer | Keiji Matsui | CSD Labs |
Customer experience
Bayes' post
Littmann Learning
In-app purchases
Bayes' post
No in-app purchases
Littmann Learning
- Standard Plan - 1 month$3.991 Month
- Premium Plan - 1 month$6.991 Month
- Basic Monthly$8.991 Month
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- Standard Plan - 1 year$19.991 Year
- Semester Pass$29.996 Months
- Premium Plan - 1 year$39.991 Year
- Full Version$44.991 Year
- Annual Pass$49.991 Year
- CE - Fundamentals$124.99
- CE -Advanced$174.99
- CE - Intermediate$249.99
Questions
Is Bayes' post free?
Is Littmann Learning free?
Which has better reviews, Bayes' post or Littmann Learning?
Do Bayes' post or Littmann Learning have ads?
Which is updated more often, Bayes' post or Littmann Learning?
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