# ctstris vs Knitting Blocks

The clearest difference is ads: ctstris at none against Knitting Blocks's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ctstris ships an update every 17 months, Knitting Blocks every 20 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | ctstris | Knitting Blocks |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 17 months** | Every 20 months |
| Size | 2 MB | 213 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Sungjun Kim](https://appshunter.io/developer/1602461985) | [BREW OYUN YAZILIM VE PAZARLAMA ANONIM SIRKETI](https://appshunter.io/developer/1564476450) |

## What reviewers say

### ctstris

[App page](https://appshunter.io/ios/app/ctstris/id6475251381)

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

**In-app purchases:** none


### Knitting Blocks

[App page](https://appshunter.io/ios/app/knitting-blocks/id6741914523)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ctstris free?

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

### Is Knitting Blocks free?

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

### Do ctstris or Knitting Blocks have ads?

Knitting Blocks shows ads; ctstris does not.

### Which is updated more often, ctstris or Knitting Blocks?

ctstris ships an update every 17 months, and Knitting Blocks every 20 months. Most recently, ctstris was updated on October 24, 2026 and Knitting Blocks on October 24, 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.*