# UDA vs StudyOS

The clearest difference is in-app purchases: UDA at none against StudyOS's 4. UDA also leads on iOS requirement (15.0 vs 17.1). StudyOS's advantage is rating (4.9 vs 4.7) and ratings volume (91 vs 9). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. StudyOS sells 4 in-app purchases, starting at $4.99 per 7 days. UDA asks for nothing beyond the download.

StudyOS holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: StudyOS has 91 ratings behind it against 9, so its average is the more settled of the two.

UDA ships an update every 8 days, StudyOS every 9 days. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | UDA | StudyOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (9 ratings)](https://appshunter.io/ios/app/uda/id563408660/reviews) | **[4.9 (91 ratings)](https://appshunter.io/ios/app/studyos-study-with-ai/id6747879382/reviews)** |
| Number of ratings | 9 | **91** |
| Positive reviews | 26.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 9 days |
| Monetization | **Free** | Freemium |
| Size | 53 MB | 118 MB |
| Requires iOS | **15.0** | 17.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Universidad del Azuay](https://appshunter.io/developer/1651454697) | [DANIEL PONCELAS VARGAS](https://appshunter.io/developer/1823171837) |

## What reviewers say

### UDA

[App page](https://appshunter.io/ios/app/uda/id563408660)

This mobile application connects students with their university. It allows users to check grades and attendance, even if they are enrolled in multiple programs simultaneously.

**Highlights:** Check grades, Monitor attendance, Support for multiple programs, University connection, Student portal

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

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is UDA free?

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

### Is StudyOS free?

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

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

StudyOS is rated higher. UDA averages 4.7 out of 5 from 9 ratings, while StudyOS averages 4.9 from 91 ratings.

### Do UDA or StudyOS have ads?

Neither UDA nor StudyOS shows ads.

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

UDA ships an update every 8 days, and StudyOS every 9 days. Most recently, UDA was updated on November 1, 2026 and StudyOS on November 5, 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.*