# SAPO vs StudyOS

The clearest difference is iOS requirement: SAPO at 13.0 against StudyOS's 17.1. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. SAPO sells 2 in-app purchases, starting at $2.99 per month and StudyOS sells 4 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

SAPO ships an update fortnightly, StudyOS every 9 days. The most recent releases landed on July 6, 2026 and August 12, 2026 respectively.

## The numbers

| Metric | SAPO | StudyOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (66 ratings)](https://appshunter.io/ios/app/studyos-study-with-ai/id6747879382/reviews)** |
| Number of ratings | — | **66** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 9 days** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 62 MB | 118 MB |
| Requires iOS | **13.0** | 17.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [BIOMAXIMA INFORMACION Y EXPERIMENTACION CIENTIFICA SOCIEDAD LIMITADA](https://appshunter.io/developer/1794186533) | [DANIEL PONCELAS VARGAS](https://appshunter.io/developer/1823171837) |

## What reviewers say

### SAPO

[App page](https://appshunter.io/ios/app/sapo-ai-statistical-assistant/id6741438601)

This app offers advanced statistical analysis tools for researchers and students. It includes guided test selection, modeling, data visualization, and an AI assistant for interpretation. Generate publication-ready reports and calculate sample sizes.

**Highlights:** Statistical Test Guidance, Advanced Modeling Tools, Integrated AI Assistant, Database Manager, Sample Size Calculator, Automatic PDF Reports, Data Visualization

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription | $2.99 | per month |
| Yearly subscription | $22.99 | per year |


### 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 SAPO free?

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

### Is StudyOS free?

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

### Do SAPO or StudyOS have ads?

Neither SAPO nor StudyOS shows ads.

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

SAPO ships an update fortnightly, and StudyOS every 9 days. Most recently, SAPO was updated on July 6, 2026 and StudyOS on August 12, 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.*