Comparison

Cardio Z 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

Cardio Z

This medical app provides instant Z-scores and centiles for pediatric cardiology measurements. It simplifies the calculation of vital cardiac and pediatric parameters, offering guidance and saving patient data for easy sharing. Designed for healthcare professionals, it streamlines clinical assessments and monitoring.

Highlights
  • Instant Z-score and centile calculations
  • Supports numerous cardiac and pediatric measurements
  • Offline functionality
  • Patient data saving and sharing
  • Customizable user settings
  • Guidance tips for measurements
Features
Read full description

Instant Z-Scores For All The Paediatric Cardiology Parameters You Review Everyday. Cardio Z has been developed by the experienced Paediatric Cardiology team at Evelina Children's Hospital, London, UK in collaboration with the technology company UBQO. The application makes it easy to calculate Z-scores and centiles for the many cardiac and paediatric measurements that are made in normal clinical practice. Cardio Z distils a wealth of clinical research parameters into a single accessible format. Z–scores and centiles are a means of expressing how far a measurement is above (positive Z-score) or below (negative Z-score) the average for the size or age of a patient. They are particularly important in assessing and monitoring growing patients, from fetal life though to adulthood. Health professionals need to be able to access the normal ranges for cardiac parameters at every age and size, and cross-checking of measurements can be time-consuming and inconvenient. Cardio Z will prove invaluable for both clinicians working directly in Paediatric Cardiology, and those who work in other fields of Paediatrics. Cardio Z allows users to access Z-scores without the need for an internet connection, or the requirement to input the same data in multiple calculators. Users can define their own settings so that they can be sure that their use of z-scores is consistent over time, whilst still allowing flexibility for the experienced clinician. Comprehensive guidance is available ensuring that measurements are consistent with those of the original research, allowing valid comparisons. Cardio-Z creates a summary of all z-scores for each patient, which can then be saved, e-mailed or printed. Simple, reliable and time-saving. FULL LIST OF FEATURES: - Cardio Z allows calculation of z-scores of: - Height, weight, BMI and head circumference - Clinic blood pressure, with calculation of a user-defined 'target centile' blood pressure - Echocardiographic measurements of most cardiac structures, including valves, chambers, vessels and coronary arteries - Fetal echocardiographic measurements, using gestational age, femur length or biparietal diameter as size reference - M-mode echocardiography, including TAPSE - Pulsed wave velocities, including E/E' ratio and E/A ratio - Tissue Doppler velocities and time intervals. Including Isovolumetric Contraction Time (IVCT), Isovolumetric Relaxation Time (IVRT), Ejection Time and Myocardial Performance Index - Discriminant scores for neonatal aortic stenosis with borderline left ventricle - ECG parameters (2nd and 98th centiles) and corrected QT interval calculation EXTRA FEATURES: - Guidance tips for measurements, including diagrams and notes of the methods of the original researchers - Centiles, as well as z-scores, displayed for all parameters - No need to re-enter height and weight: baseline data only needs to be entered once - Generation of a .pdf summary which can be saved, e-mailed or printed - Saved patient Z-score summaries can be accessed and edited at a later date - Short-cut keys for frequently used parameters - Body surface area calculator can be defined to use the same algorithms as the original research - Cardio Z reduces the inconvenience of making Z-score calculations, and improves the correct application of this important clinical tool. The App is not a substitute for clinical judgement or institutional policies, thus it should complement and not replace normal procedures for making clinical decisions. We hope you enjoy using Cardio Z!

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

Cardio Z4 screens
Littmann Learning4 screens

Verdict

The call

The clearest difference is price: Littmann Learning at Free against Cardio Z's $6.99. Littmann Learning also leads on rating (4.9 vs 4.0) and update cadence (every 6 weeks vs every 21 months). Cardio Z's advantage is in-app purchases (none vs 11) and review sentiment (61% vs 48%). On 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

Littmann Learning is free to download; Cardio Z costs $6.99 up front. Littmann Learning sells 11 in-app purchases, starting at $3.99 per month. Cardio Z 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 855 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 61% of Cardio Z'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

Cardio Z ships an update every 21 months, Littmann Learning every 6 weeks. Both last shipped on October 24, 2026.

Scorecard8 real differences · 2 level
Cardio Z versus Littmann Learning: the parameters behind the verdict, then further details
ParameterCardio ZLittmann Learning
Price$6.99Free — better
Rating4.0 (3 ratings)4.9 (855 ratings) — better
Positive reviews61.1% of reviews — better47.6% of reviews
Number of ratings3855 — better
Update frequencyEvery 21 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better15.6
Further details — not scored
Size15 MB19 MB
Age rating4+17+
DeveloperUBQO LimitedCSD Labs

Customer experience

Cardio Z

All ratings3 ratings
Positive66.7%
Neutral33.3%
Negative0.0%
Written reviews18 reviews
Positive61.1%
Neutral5.6%
Negative33.3%

Littmann Learning

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

In-app purchases

None

Cardio Z

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 Cardio Z free?
Cardio Z costs $6.99, with no in-app purchases.
Is Littmann Learning free?
Littmann Learning is free to download, with in-app purchases available.
Which has better reviews, Cardio Z or Littmann Learning?
Littmann Learning is rated higher. Cardio Z averages 4.0 out of 5 from 3 ratings, while Littmann Learning averages 4.9 from 855 ratings.
Do Cardio Z or Littmann Learning have ads?
Neither Cardio Z nor Littmann Learning shows ads.
Which is updated more often, Cardio Z or Littmann Learning?
Cardio Z ships an update every 21 months, and Littmann Learning every 6 weeks. Most recently, Cardio Z was updated on October 24, 2026 and Littmann Learning on October 24, 2026.

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