# Steiner Tree vs Shor's algorithm

The clearest difference is in-app purchases: Steiner Tree at none against Shor's algorithm's 3. Steiner Tree also leads on iOS requirement (12.0 vs 16.0). Shor's algorithm's advantage is update cadence (every 6 months vs every 45 months). 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. Steiner Tree asks for nothing beyond the download.

Steiner Tree ships an update every 45 months, Shor's algorithm every 6 months. The most recent releases landed on October 1, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Steiner Tree | Shor's algorithm |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 45 months | **Every 6 months** |
| Size | 1 MB | 7 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Reinhard MAENNER](https://appshunter.io/developer/578568275) | [Sungjun Kim](https://appshunter.io/developer/1602461985) |

## What reviewers say

### Steiner Tree

[App page](https://appshunter.io/ios/app/steiner-tree/id590732192)

**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 Steiner Tree free?

Steiner Tree 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 Steiner Tree or Shor's algorithm have ads?

Neither Steiner Tree nor Shor's algorithm shows ads.

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

Steiner Tree ships an update every 45 months, and Shor's algorithm every 6 months. Most recently, Steiner Tree was updated on October 1, 2026 and Shor's algorithm on September 28, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*