Comparison

eGFR Calculators vs Littmann Learning

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

Head to head
About

eGFR Calculators

This app provides medical professionals with five distinct calculators to estimate kidney function. It also offers educational information on glomerular filtration rate, chronic kidney disease, and its management.

Highlights
  • Five eGFR calculator options
  • CKD-EPI Creatinine 2021 Equation
  • Revised Bedside Schwartz Formula (pediatric)
  • Cockcroft-Gault Formula
  • CKD-EPI Cystatin C 2012 Equation
  • Information on GFR and CKD
Features
Read full description

From the National Kidney Foundation (NKF), this application allows medical professionals to estimate kidney function using five separate eGFR calculators: - CKD-EPI Creatinine 2021 Equation (Preferred method) - Revised Bedside Schwartz Formula (For ages 1-17) - Cockcroft-Gault Formula - CKD-EPI Cystatin C 2012 Equation - CKD-EPI Creatinine - Cystatin C 2021 Equation Also includes information on: -Glomerular filtration rate (GFR) -Chronic kidney disease (CKD) -Clinical use on how to test, evaluate, and slow progression -Formulas The National Kidney Foundation is the leading organization in the U.S. dedicated to the awareness, prevention, and treatment of kidney disease for hundreds of thousands of healthcare professionals, millions of patients and their families, and tens of millions of Americans at risk. By supporting the National Kidney Foundation, you directly influence and positively impact the lives of those at risk for kidney disease, those living with chronic kidney disease, and those who care for and about them. Learn more at www.kidney.org 30 East 3rd Street New York, NY 10016 www.kidney.org 800-622-9010

About

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.

Highlights
  • Real patient heart and lung sounds
  • Visual and audio displays
  • Self-paced learning modules
  • Graduated learning difficulty
  • Background reading material
Features
Read full description

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

eGFR Calculators4 screens
Littmann Learning4 screens

Verdict

The call

The clearest difference is rating: Littmann Learning at 4.9 against eGFR Calculators's 4.0. Littmann Learning also leads on update cadence (every 6 weeks vs every 9 months) and ratings volume (850 vs 16). eGFR Calculators's advantage is in-app purchases (none vs 11). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Littmann Learning sells 11 in-app purchases, starting at $3.99 per month. eGFR Calculators asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Littmann Learning holds the better App Store score, 4.9 against 4.0. That said, the two scores are not equally well evidenced: Littmann Learning has 850 ratings behind it against 16, so its average is the more settled of the two. Written reviews complicate that: 53% of eGFR Calculators'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.

UpkeepUpdate frequency

eGFR Calculators ships an update every 9 months, Littmann Learning every 6 weeks. Both last shipped on October 16, 2026.

Scorecard5 real differences · 5 level
eGFR Calculators versus Littmann Learning: the parameters behind the verdict, then further details
ParametereGFR CalculatorsLittmann Learning
PriceFreeFree
Rating4.0 (16 ratings)4.9 (850 ratings) — better
Positive reviews52.9% of reviews — better47.6% of reviews
Number of ratings16850 — better
Update frequencyEvery 9 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.0 — better15.6
Further details — not scored
Size7 MB19 MB
Age rating17+17+
DeveloperNational Kidney FoundationCSD Labs

Customer experience

eGFR Calculators

All ratings16 ratings
Positive68.8%
Neutral12.5%
Negative18.8%
Written reviews17 reviews
Positive52.9%
Neutral29.4%
Negative17.6%

Littmann Learning

All ratings850 ratings
Positive97.9%
Neutral1.1%
Negative1.1%
Written reviews21 reviews
Positive47.6%
Neutral14.3%
Negative38.1%

In-app purchases

None

eGFR Calculators

No in-app purchases

11 purchases

Littmann Learning

Subscriptions8
  • Standard Plan - 1 month$3.991 Month
  • Premium Plan - 1 month$6.991 Month
  • Basic Monthly$8.991 Month
Show 5 more
  • 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
One-time3
  • CE - Fundamentals$124.99
  • CE -Advanced$174.99
  • CE - Intermediate$249.99

Questions

Is eGFR Calculators free?
eGFR Calculators is free to download, with no in-app purchases.
Is Littmann Learning free?
Littmann Learning is free to download, with in-app purchases available.
Which has better reviews, eGFR Calculators or Littmann Learning?
Littmann Learning is rated higher. eGFR Calculators averages 4.0 out of 5 from 16 ratings, while Littmann Learning averages 4.9 from 850 ratings.
Do eGFR Calculators or Littmann Learning have ads?
Neither eGFR Calculators nor Littmann Learning shows ads.
Which is updated more often, eGFR Calculators or Littmann Learning?
eGFR Calculators ships an update every 9 months, and Littmann Learning every 6 weeks. Most recently, eGFR Calculators was updated on October 16, 2026 and Littmann Learning on October 16, 2026.

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