# StudyOS vs NoteFren

The clearest difference is ratings volume: StudyOS at 91 against NoteFren's 3. On price, rating, update cadence and ads there is nothing between them.

Both are free to download. StudyOS sells 4 in-app purchases, starting at $4.99 per 7 days and NoteFren sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.9 for StudyOS against 5.0 for NoteFren. That said, the two scores are not equally well evidenced: StudyOS has 91 ratings behind it against 3, so its average is the more settled of the two.

StudyOS ships an update every 9 days, NoteFren weekly. Both last shipped on October 24, 2026.

## The numbers

| Metric | StudyOS | NoteFren |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (91 ratings)](https://appshunter.io/ios/app/studyos-study-with-ai/id6747879382/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/notefren-ai-flashcards/id6753096054/reviews)** |
| Number of ratings | **91** | 3 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | **Weekly** |
| Monetization | Freemium | Freemium |
| Size | 118 MB | 56 MB |
| Requires iOS | 17.1 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [DANIEL PONCELAS VARGAS](https://appshunter.io/developer/1823171837) | [Loona Brands](https://appshunter.io/developer/1809456565) |

## What reviewers say

### StudyOS

[App page](https://appshunter.io/ios/app/studyos-study-with-ai/id6747879382)

Transform your study materials into interactive flashcards, summaries, and quizzes with AI. This app efficiently prepares you for exams and helps you master concepts on the go, making learning faster and more engaging.

**Highlights:** AI-generated flashcards, Automated summaries, Personalized quizzes, Material upload (notes, PDFs, images), Spaced repetition techniques, Progress tracking

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $4.99 | per 7 days |
| Premium Access | $12.99 | per month |
| Premium Access | $12.99 | per month |
| Premium Access | $69.99 | per year |


### NoteFren

[App page](https://appshunter.io/ios/app/notefren-ai-flashcards/id6753096054)

This app uses AI to convert handwritten notes, text, and audio into smart flashcards. It offers various study techniques like spaced repetition and active recall, along with progress tracking to enhance learning and retention for any subject.

**Highlights:** AI flashcard generation, Multiple study techniques, Progress tracking and analytics, Camera, voice, and text input, Various quiz modes, Note organization with categories

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NoteFren Pro Weekly | $4.99 | per 7 days |
| NoteFren Pro Monthly | $9.99 | per month |
| NoteFren Pro Yearly | $59.99 | per year |


## Frequently asked questions

### Is StudyOS free?

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

### Is NoteFren free?

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

### Which has better reviews, StudyOS or NoteFren?

NoteFren is rated higher. StudyOS averages 4.9 out of 5 from 91 ratings, while NoteFren averages 5.0 from 3 ratings.

### Do StudyOS or NoteFren have ads?

Neither StudyOS nor NoteFren shows ads.

### Which is updated more often, StudyOS or NoteFren?

StudyOS ships an update every 9 days, and NoteFren weekly. Most recently, StudyOS was updated on October 24, 2026 and NoteFren on October 24, 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.*