# Osmosis vs Ophthalmic Instruments

The clearest difference is review sentiment: Ophthalmic Instruments at 100% against Osmosis's 47%. Ophthalmic Instruments also leads on in-app purchases (none vs 10) and iOS requirement (13.0 vs 16.6). Osmosis's advantage is ads (none vs shown) and update cadence (monthly vs every 34 months). On price and device support there is nothing between them.

Both are free to download. Osmosis sells 10 in-app purchases, starting at $16.99 per month. Ophthalmic Instruments asks for nothing beyond the download.

Osmosis ships an update monthly, Ophthalmic Instruments every 34 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Osmosis | Ophthalmic Instruments |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (3.9K ratings)](https://appshunter.io/ios/app/osmosis-med-school-study-app/id646540641/reviews)** | — |
| Number of ratings | **3.9K** | — |
| Positive reviews | 47.4% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 34 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Best chart rank | **#43** | — |
| Size | 70 MB | 32 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Knowledge Diffusion](https://appshunter.io/developer/646540644) | [Roman Moiseev](https://appshunter.io/developer/1877504595) |

## What reviewers say

### Osmosis

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

**Currently charting:** #43 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 (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Osmosis Full Access Monthly | $16.99 | per month |
| Osmosis Suite Access Monthly | $49.00 | per month |
| Clinical Science 6 Month | $129.00 | per 6 months |
| Osmosis Suite Access 3 Month | $149.00 | per 3 months |
| 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


### Ophthalmic Instruments

[App page](https://appshunter.io/ios/app/ophthalmic-instruments/id1666850241)

Access a comprehensive library of over 270 high-quality images of ophthalmic instruments, each with clear descriptions. Navigate effortlessly with an intuitive interface and test your knowledge with an interactive quiz mode.

**Highlights:** 270+ high-quality images, Clear, concise descriptions, Intuitive interface, Interactive knowledge check mode

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Osmosis free?

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

### Is Ophthalmic Instruments free?

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

### Do Osmosis or Ophthalmic Instruments have ads?

Ophthalmic Instruments shows ads; Osmosis does not.

### Which is updated more often, Osmosis or Ophthalmic Instruments?

Osmosis ships an update monthly, and Ophthalmic Instruments every 34 months. Most recently, Osmosis was updated on November 6, 2026 and Ophthalmic Instruments on November 3, 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.*