# Shor's algorithm vs RYORAKU

The clearest difference is in-app purchases: RYORAKU at none against Shor's algorithm's 3. RYORAKU also leads on update cadence (every 2 weeks vs every 6 months). Shor's algorithm's advantage is ads (none vs shown). On price, 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. RYORAKU asks for nothing beyond the download.

Shor's algorithm ships an update every 6 months, RYORAKU every 2 weeks. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Shor's algorithm | RYORAKU |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Every 2 weeks** |
| Size | 7 MB | 27 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) | [Fuji Bit Inc.](https://appshunter.io/developer/1874205957) |

## 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 |


### RYORAKU

[App page](https://appshunter.io/ios/app/ryoraku/id6760751278)

**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 RYORAKU free?

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

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

RYORAKU shows ads; Shor's algorithm does not.

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

Shor's algorithm ships an update every 6 months, and RYORAKU every 2 weeks. Most recently, Shor's algorithm was updated on October 27, 2026 and RYORAKU on October 25, 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.*