# Теорема Виета vs educISA

The clearest difference is update cadence: educISA at every 4 days against Теорема Виета's every 10 months. educISA also leads on iOS requirement (15.0 vs 18.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Теорема Виета ships an update every 10 months, educISA every 4 days. Both last shipped on October 10, 2026.

## The numbers

| Metric | Теорема Виета | educISA |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 4 days** |
| Size | 1 MB | 24 MB |
| Requires iOS | 18.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Artem Chursin](https://appshunter.io/developer/1355128630) | [Sahil Isayev](https://appshunter.io/developer/6791992799) |

## What reviewers say

### Теорема Виета

[App page](https://appshunter.io/ios/app/id1355128871)

**Features:** macOS Compatibility

**In-app purchases:** none


### educISA

[App page](https://appshunter.io/ios/app/educisa-math-and-physics/id6791992797)

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

**In-app purchases:** none


## Frequently asked questions

### Is Теорема Виета free?

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

### Is educISA free?

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

### Do Теорема Виета or educISA have ads?

Neither Теорема Виета nor educISA shows ads.

### Which is updated more often, Теорема Виета or educISA?

Теорема Виета ships an update every 10 months, and educISA every 4 days. Most recently, Теорема Виета was updated on October 10, 2026 and educISA on October 10, 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.*