# Einstein Teacher vs Shor's algorithm

The clearest difference is in-app purchases: Einstein Teacher at none against Shor's algorithm's 3. Einstein Teacher also leads on update cadence (every 5 weeks vs every 6 months) and iOS requirement (13.0 vs 16.0). On price, ads and device support there is nothing between them.

Both are free to download. Shor's algorithm sells 3 one-off in-app purchases. Einstein Teacher asks for nothing beyond the download.

Einstein Teacher ships an update every 5 weeks, Shor's algorithm every 6 months. The most recent releases landed on October 3, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Einstein Teacher | Shor's algorithm |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 6 months |
| Size | 46 MB | 7 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Source of Life Technologies, Inc.](https://appshunter.io/developer/1067220443) | [Sungjun Kim](https://appshunter.io/developer/1602461985) |

## What reviewers say

### Einstein Teacher

[App page](https://appshunter.io/ios/app/einstein-teacher/id6469037450)

**Features:** macOS Compatibility

**In-app purchases:** none


### Shor's algorithm

[App page](https://appshunter.io/ios/app/shors-algorithm/id6472044082)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| coffee | $0.99 | one-time |
| latte | $4.99 | one-time |
| whopper set | $9.99 | one-time |


## Frequently asked questions

### Is Einstein Teacher free?

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

### Is Shor's algorithm free?

Shor's algorithm is free to download, with in-app purchases available.

### Do Einstein Teacher or Shor's algorithm have ads?

Neither Einstein Teacher nor Shor's algorithm shows ads.

### Which is updated more often, Einstein Teacher or Shor's algorithm?

Einstein Teacher ships an update every 5 weeks, and Shor's algorithm every 6 months. Most recently, Einstein Teacher was updated on October 3, 2026 and Shor's algorithm 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.*