# Shor's algorithm vs Little Quantum App

The clearest difference is in-app purchases: Little Quantum App at none against Shor's algorithm's 3. Little Quantum App also leads on update cadence (every 2 weeks vs every 6 months). On price, ads, device support and iOS requirement there is nothing between them.

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

Shor's algorithm ships an update every 6 months, Little Quantum App every 2 weeks. The most recent releases landed on May 19, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Shor's algorithm | Little Quantum App |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 weeks** |
| Size | 7 MB | 169 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sungjun Kim](https://appshunter.io/developer/1602461985) | [Ludwig-Maximilians-Universitaet Muenchen](https://appshunter.io/developer/1634377997) |

## What reviewers say

### 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 |


### Little Quantum App

[App page](https://appshunter.io/ios/app/little-quantum-app/id6752292817)

**In-app purchases:** none


## Frequently asked questions

### Is Shor's algorithm free?

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

### Is Little Quantum App free?

Little Quantum App is free to download, with no in-app purchases.

### Do Shor's algorithm or Little Quantum App have ads?

Neither Shor's algorithm nor Little Quantum App shows ads.

### Which is updated more often, Shor's algorithm or Little Quantum App?

Shor's algorithm ships an update every 6 months, and Little Quantum App every 2 weeks. Most recently, Shor's algorithm was updated on May 19, 2026 and Little Quantum App on September 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.*