# Shor's algorithm vs Ket Steps

The clearest difference is in-app purchases: Ket Steps at none against Shor's algorithm's 3. Ket Steps also leads on update cadence (every 2 weeks vs every 6 months). Shor's algorithm's advantage is iOS requirement (16.0 vs 18.0). 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. Ket Steps asks for nothing beyond the download.

Shor's algorithm ships an update every 6 months, Ket Steps every 2 weeks. The most recent releases landed on October 10, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Shor's algorithm | Ket Steps |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 weeks** |
| Size | 7 MB | 7 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sungjun Kim](https://appshunter.io/developer/1602461985) | [YARON AMIR BENJAMIN DR. GOLDSTEIN](https://appshunter.io/developer/1850455880) |

## 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 |


### Ket Steps

[App page](https://appshunter.io/ios/app/ket-steps/id6762529698)

**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 Ket Steps free?

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

### Do Shor's algorithm or Ket Steps have ads?

Neither Shor's algorithm nor Ket Steps shows ads.

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

Shor's algorithm ships an update every 6 months, and Ket Steps every 2 weeks. Most recently, Shor's algorithm was updated on October 10, 2026 and Ket Steps 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.*