# Sofia Kovalevskaya vs AzTech

The clearest difference is price: AzTech at Free against Sofia Kovalevskaya's $1.99. Sofia Kovalevskaya's advantage is update cadence (every 26 months vs every 55 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

AzTech is free to download; Sofia Kovalevskaya costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Sofia Kovalevskaya ships an update every 26 months, AzTech every 55 months. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Sofia Kovalevskaya | AzTech |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/aztech-empiric-empire/id1516881111/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 26 months** | Every 55 months |
| Monetization | — | Free |
| Size | 30 MB | 498 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPad, Mac, Apple TV | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ventura Educational Systems](https://appshunter.io/developer/371324172) | [7 Generation Games](https://appshunter.io/developer/928503461) |

## What reviewers say

### Sofia Kovalevskaya

[App page](https://appshunter.io/ios/app/sofia-kovalevskaya/id1447980726)

**Features:** Vision Pro support

**In-app purchases:** none


### AzTech

[App page](https://appshunter.io/ios/app/aztech-empiric-empire/id1516881111)

Embark on an adventure through the Aztec Empire to learn essential math and science concepts. This game uses engaging puzzles and a compelling narrative to teach fractions, decimals, percentages, and statistics in a real-world context.

**Highlights:** Learn fractions, decimals, percentages, and statistics, Engaging games, puzzles, and narrative, Contextualized learning in public health and science, Interactive activities for standardized assessments, Aligned with Common Core State Standards, Adventure set in the Aztec Empire

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sofia Kovalevskaya free?

Sofia Kovalevskaya costs $1.99, with no in-app purchases.

### Is AzTech free?

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

### Do Sofia Kovalevskaya or AzTech have ads?

Neither Sofia Kovalevskaya nor AzTech shows ads.

### Which is updated more often, Sofia Kovalevskaya or AzTech?

Sofia Kovalevskaya ships an update every 26 months, and AzTech every 55 months. Most recently, Sofia Kovalevskaya was updated on October 20, 2026 and AzTech on October 24, 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.*