# Littmann Learning vs Fluid

The clearest difference is in-app purchases: Fluid at none against Littmann Learning's 11. Fluid also leads on iOS requirement (13.0 vs 15.6). Littmann Learning's advantage is update cadence (every 6 weeks vs every 9 months). On price, 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. Fluid asks for nothing beyond the download.

Littmann Learning ships an update every 6 weeks, Fluid every 9 months. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Littmann Learning | Fluid |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (856 ratings)](https://appshunter.io/ios/app/littmann-learning/id1324485260/reviews)** | — |
| Number of ratings | **856** | — |
| Positive reviews | 47.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 9 months |
| Monetization | Free with in-app purchases | — |
| Size | 19 MB | 13 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [CSD Labs](https://appshunter.io/developer/1318756877) | [Kehinde Yahaya](https://appshunter.io/developer/1588117685) |

## What reviewers say

### 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 |


### Fluid

[App page](https://appshunter.io/ios/app/fluid-electrolyte-calculator/id1589670386)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Littmann Learning free?

Littmann Learning is free to download, with in-app purchases available.

### Is Fluid free?

Fluid is free to download, with no in-app purchases.

### Do Littmann Learning or Fluid have ads?

Neither Littmann Learning nor Fluid shows ads.

### Which is updated more often, Littmann Learning or Fluid?

Littmann Learning ships an update every 6 weeks, and Fluid every 9 months. Most recently, Littmann Learning was updated on October 29, 2026 and Fluid on October 27, 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.*