# PopStudy vs Rational Algebraic Expressions

The clearest difference is in-app purchases: Rational Algebraic Expressions at none against PopStudy's 3. Rational Algebraic Expressions also leads on iOS requirement (12.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. PopStudy sells 3 one-off in-app purchases. Rational Algebraic Expressions asks for nothing beyond the download.

## The numbers

| Metric | PopStudy | Rational Algebraic Expressions |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (8 ratings)](https://appshunter.io/ios/app/popstudy-language-learning/id1169672977/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Monetization | Ad-supported | — |
| Size | 145 MB | 31 MB |
| Requires iOS | 18.0 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Longtail Studios](https://appshunter.io/developer/305747913) | [Science Education Institute](https://appshunter.io/developer/1439710468) |

## What reviewers say

### PopStudy

[App page](https://appshunter.io/ios/app/popstudy-language-learning/id1169672977)

Master any subject with this educational app utilizing a spaced repetition system. Create custom study mixes, engage in personalized sessions, and track your learning progress. Access curated content and study offline on your devices.

**Highlights:** Spaced repetition system, Curated expert content, Customizable study mixes, Personalized daily sessions, Progress tracking, Cross-device syncing, Offline studying

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1-Month Subscription | $7.99 | one-time |
| 3-Month Subscription | $19.99 | one-time |
| 1-Year Subscription | $59.99 | one-time |


### Rational Algebraic Expressions

[App page](https://appshunter.io/ios/app/rational-algebraic-expressions/id6504674075)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PopStudy free?

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

### Is Rational Algebraic Expressions free?

Rational Algebraic Expressions is free to download, with no in-app purchases.

### Do PopStudy or Rational Algebraic Expressions have ads?

Neither PopStudy nor Rational Algebraic Expressions shows ads.

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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.*