# Open Brush for Zapbox vs Eink Vein

The clearest difference is update cadence: Eink Vein at every 2 weeks against Open Brush for Zapbox's every 6 months. On price, ads, 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.

Open Brush for Zapbox ships an update every 6 months, Eink Vein every 2 weeks. The most recent releases landed on October 11, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Open Brush for Zapbox | Eink Vein |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 weeks** |
| Size | 477 MB | 61 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Icosa Foundation](https://appshunter.io/developer/1689756584) | [深圳市合一智联科技有限公司](https://appshunter.io/developer/1748739385) |

## What reviewers say

### Open Brush for Zapbox

[App page](https://appshunter.io/ios/app/open-brush-for-zapbox/id6449972076)

**In-app purchases:** none


### Eink Vein

[App page](https://appshunter.io/ios/app/eink-vein/id6503286200)

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

**In-app purchases:** none


## Frequently asked questions

### Is Open Brush for Zapbox free?

Open Brush for Zapbox is free to download, with no in-app purchases.

### Is Eink Vein free?

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

### Do Open Brush for Zapbox or Eink Vein have ads?

Neither Open Brush for Zapbox nor Eink Vein shows ads.

### Which is updated more often, Open Brush for Zapbox or Eink Vein?

Open Brush for Zapbox ships an update every 6 months, and Eink Vein every 2 weeks. Most recently, Open Brush for Zapbox was updated on October 11, 2026 and Eink Vein on October 27, 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.*