# Osmosis vs MIR Spiro

The clearest difference is in-app purchases: MIR Spiro at none against Osmosis's 14. MIR Spiro also leads on iOS requirement (12.4 vs 16.6). Osmosis's advantage is review sentiment (47% vs 17%) and ratings volume (3.9K vs 2). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Osmosis sells 12 in-app purchases, starting at $16.99 per month. MIR Spiro asks for nothing beyond the download.

Osmosis holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: Osmosis has 3.9K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 47% of Osmosis's written reviews are positive against 17% of MIR Spiro's.

Osmosis ships an update monthly, MIR Spiro every 2 months. The most recent releases landed on November 1, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Osmosis | MIR Spiro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (3.9K ratings)](https://appshunter.io/ios/app/osmosis-med-school-study-app/id646540641/reviews)** | [4.5 (2 ratings)](https://appshunter.io/ios/app/mir-spiro/id947868756/reviews) |
| Number of ratings | **3.9K** | 2 |
| Positive reviews | **47.4% of reviews** | 16.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#69** | — |
| Size | 70 MB | 23 MB |
| Requires iOS | 16.6 | **12.4** |
| Devices | **iPhone, iPad** | iPad |
| Age rating | 17+ | 17+ |
| Developer | [Knowledge Diffusion](https://appshunter.io/developer/646540644) | [MIR Medical International Research](https://appshunter.io/developer/1010662698) |

## What reviewers say

### Osmosis

[App page](https://appshunter.io/ios/app/osmosis-med-school-study-app/id646540641)

**Currently charting:** #69 Top Grossing · Medical (US App Store)

This app helps medical students learn complex concepts faster and retain more information. It offers animated videos, flashcards, notes, and board-style questions to prepare for exams and build clinical skills.

**Highlights:** Animated medical videos, Spaced repetition flashcards, Board-style practice questions, Downloadable notes and videos, Clinical decision-making trees, Cross-platform syncing

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Osmosis Full Access Monthly | $16.99 | per month |
| Clinical Sciences Monthly | $16.99 | per month |
| Osmosis Basic Sciences Monthly | $16.99 | per month |
| Osmosis Suite Access Monthly | $49.00 | per month |
| Clinical Science 6 Month | $129.00 | per 6 months |
| Clinical Science Access Yearly | $169.00 | per year |
| Basic Sciences Access 6 Month | $179.00 | per 6 months |
| Osmosis Full Access 6 Month | $179.99 | per 6 months |
| Osmosis Full Access Yearly | $199.99 | per year |
| Basic Sciences Access Yearly | $199.99 | per year |
| Osmosis Suite Access 6 Month | $229.00 | per 6 months |
| Osmosis Suite Access Yearly | $249.00 | per year |

**What reviewers like**

- 🚀 Great study tool
- 💡 Helpful videos and flashcards
- 👍 Engaging and easy to understand content
- 🚀 Efficient for on-the-go learning
- 👍 Customizable study experience

**What reviewers complain about**

- 🐛 Buggy app with crashes and glitches
- 🔋 Offline functionality issues
- 👎 Limited features compared to website
- 👎 Subscription confusion and billing issues
- 👎 Slow and unresponsive app performance

**Reported bugs**

- Verification email never sent
- Videos won't play or keep restarting
- Inability to access high-yield notes on app
- Flashcards and quizzes not working properly
- App getting stuck on loading/login screens

**Requested features**

- Add speech pathology to the platform
- Provide Arabic subtitles for videos
- Implement split-screen functionality
- Allow editing of flashcards on mobile
- Improve search and playlist features


### MIR Spiro

[App page](https://appshunter.io/ios/app/mir-spiro/id947868756)

This iOS app enables real-time spirometry and oximetry testing on iPads for healthcare providers. It measures key lung function parameters and blood oxygen saturation, offering pediatric incentives and data transfer capabilities.

**Highlights:** Real-time spirometry testing, Real-time oximetry testing, Measures FVC, FEV1, PEF, %SpO2, Pulse Rate, Pediatric incentive feature, Data transfer for backup, HL7 standard support

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Osmosis free?

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

### Is MIR Spiro free?

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

### Which has better reviews, Osmosis or MIR Spiro?

Osmosis is rated higher. Osmosis averages 4.8 out of 5 from 3.9K ratings, while MIR Spiro averages 4.5 from 2 ratings.

### Do Osmosis or MIR Spiro have ads?

Neither Osmosis nor MIR Spiro shows ads.

### Which is updated more often, Osmosis or MIR Spiro?

Osmosis ships an update monthly, and MIR Spiro every 2 months. Most recently, Osmosis was updated on November 1, 2026 and MIR Spiro on October 7, 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.*