# Shor's algorithm vs BitSpinner

The clearest difference is in-app purchases: BitSpinner at none against Shor's algorithm's 3. Shor's algorithm's advantage is iOS requirement (16.0 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

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

Shor's algorithm ships an update every 6 months, BitSpinner every 4 months. The most recent releases landed on October 10, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Shor's algorithm | BitSpinner |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 4 months** |
| Size | 7 MB | 8 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sungjun Kim](https://appshunter.io/developer/1602461985) | [Robert Lis](https://appshunter.io/developer/567589617) |

## 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 |


### BitSpinner

[App page](https://appshunter.io/ios/app/bitspinner/id6761688095)

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

**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 BitSpinner free?

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

### Do Shor's algorithm or BitSpinner have ads?

Neither Shor's algorithm nor BitSpinner shows ads.

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

Shor's algorithm ships an update every 6 months, and BitSpinner every 4 months. Most recently, Shor's algorithm was updated on October 10, 2026 and BitSpinner on October 14, 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.*