# eGFR Calculators vs Littmann Learning

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.

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.

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.

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

## The numbers

| Metric | eGFR Calculators | Littmann Learning |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (16 ratings)](https://appshunter.io/ios/app/egfr-calculators/id483182385/reviews) | **[4.9 (850 ratings)](https://appshunter.io/ios/app/littmann-learning/id1324485260/reviews)** |
| Number of ratings | 16 | **850** |
| Positive reviews | **52.9% of reviews** | 47.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 6 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 7 MB | 19 MB |
| Requires iOS | **14.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [National Kidney Foundation](https://appshunter.io/developer/418198855) | [CSD Labs](https://appshunter.io/developer/1318756877) |

## What reviewers say

### eGFR Calculators

[App page](https://appshunter.io/ios/app/egfr-calculators/id483182385)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Littmann Learning

[App page](https://appshunter.io/ios/app/littmann-learning/id1324485260)

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:** Vision Pro support

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Standard Plan - 1 month | $3.99 | per month |
| Premium Plan - 1 month | $6.99 | per month |
| Basic Monthly | $8.99 | per month |
| Standard Plan - 1 year | $19.99 | per year |
| Semester Pass | $29.99 | per 6 months |
| Premium Plan - 1 year | $39.99 | per year |
| Full Version | $44.99 | per year |
| Annual Pass | $49.99 | per year |
| CE -  Fundamentals | $124.99 | one-time |
| CE -Advanced | $174.99 | one-time |
| CE - Intermediate | $249.99 | one-time |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*