# StudyOS vs Astra AI

The clearest difference is ads: StudyOS at none against Astra AI's shown. Astra AI's advantage is ratings volume (5.3K vs 91) and chart position (#128 vs unranked). On price, rating, in-app purchases and monetization model there is nothing between them.

Both are free to download. StudyOS sells 4 in-app purchases, starting at $4.99 per 7 days and Astra AI sells 10 in-app purchases, starting at $8.00 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 4.8 for Astra AI. That said, the two scores are not equally well evidenced: Astra AI has 5.3K ratings behind it against 91, so its average is the more settled of the two.

StudyOS ships an update every 9 days, Astra AI every 4 days. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | StudyOS | Astra AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (91 ratings)](https://appshunter.io/ios/app/studyos-study-with-ai/id6747879382/reviews)** | [4.8 (5.3K ratings)](https://appshunter.io/ios/app/astra-ai-study-and-exam-prep/id6751030141/reviews) |
| Number of ratings | 91 | **5.3K** |
| Positive reviews | — | 81.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 9 days | **Every 4 days** |
| Monetization | Freemium | Free with in-app purchases |
| Best chart rank | — | **#128** |
| Size | 118 MB | 26 MB |
| Requires iOS | 17.1 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [DANIEL PONCELAS VARGAS](https://appshunter.io/developer/1823171837) | [Astra AI d.o.o.](https://appshunter.io/developer/1833181873) |

## 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 |


### Astra AI

[App page](https://appshunter.io/ios/app/astra-ai-study-and-exam-prep/id6751030141)

**Currently charting:** #128 Top Free · Education (US App Store)

This AI-powered tutoring app provides personalized, step-by-step assistance for a wide range of subjects including math, physics, and chemistry. It offers instant solutions to homework problems, targeted exam preparation, and in-depth subject exploration to help students learn more efficiently and build confidence.

**Highlights:** Snap and solve homework problems, Step-by-step problem solving, Personalized exam preparation, Curriculum-aligned lessons, 24/7 subject support, Covers 14 subjects

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Astra AI Plus - Weekly | $8.00 | per 7 days |
| Astra AI Plus - Monthly | $24.00 | per month |
| Astra AI Sigma - Monthly | $80.00 | per month |
| Astra AI Plus - Yearly | $119.99 | per year |
| Astra AI Plus - Monthly (12 Mo Com) | $119.99 | per year |
| Astra AI Plus - Yearly | $119.99 | per year |
| Credit Pack 2x | $15.00 | one-time |
| Credit Pack 3x | $28.00 | one-time |
| Credit Pack 5x | $52.00 | one-time |
| Credit Pack 10x | $99.00 | one-time |


## Frequently asked questions

### Is StudyOS free?

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

### Is Astra AI free?

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

### Which has better reviews, StudyOS or Astra AI?

StudyOS is rated higher. StudyOS averages 4.9 out of 5 from 91 ratings, while Astra AI averages 4.8 from 5.3K ratings.

### Do StudyOS or Astra AI have ads?

Astra AI shows ads; StudyOS does not.

### Which is updated more often, StudyOS or Astra AI?

StudyOS ships an update every 9 days, and Astra AI every 4 days. Most recently, StudyOS was updated on October 24, 2026 and Astra AI on October 30, 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.*