# DotInk vs Crux 一刻

The clearest difference is in-app purchases: Crux 一刻 at none against DotInk's 3. Crux 一刻 also leads on update cadence (daily vs weekly). DotInk's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 18.0). On price and ads there is nothing between them.

Both are free to download. DotInk sells 3 in-app purchases, starting at $0.99 per month. Crux 一刻 asks for nothing beyond the download.

DotInk ships an update weekly, Crux 一刻 daily. The most recent releases landed on September 26, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | DotInk | Crux 一刻 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/dotink-eink-assistant/id6754073002/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Daily** |
| Monetization | Freemium | — |
| Size | 11 MB | 10 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [业 毕](https://appshunter.io/developer/1850598730) | [晓晨 高](https://appshunter.io/developer/1878619980) |

## What reviewers say

### DotInk

[App page](https://appshunter.io/ios/app/dotink-eink-assistant/id6754073002)

This app helps e-ink device owners customize fonts and convert e-books for their readers. It offers WYSIWYG font editing, e-book formatting, and seamless wireless integration with supported devices. All processing is done offline, prioritizing user privacy.

**Highlights:** WYSIWYG font customization, E-book conversion and formatting, Wireless device integration, Offline processing, Real-time screen simulation, Import TTF fonts

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro | $0.99 | per month |
| Yearly Pro | $5.99 | per year |
| Lifetime Pro | $14.99 | one-time |


### Crux 一刻

[App page](https://appshunter.io/ios/app/crux/id6759450678)

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

**In-app purchases:** none


## Frequently asked questions

### Is DotInk free?

DotInk is free to download, with in-app purchases available.

### Is Crux 一刻 free?

Crux 一刻 is free to download, with no in-app purchases.

### Do DotInk or Crux 一刻 have ads?

Neither DotInk nor Crux 一刻 shows ads.

### Which is updated more often, DotInk or Crux 一刻?

DotInk ships an update weekly, and Crux 一刻 daily. Most recently, DotInk was updated on September 26, 2026 and Crux 一刻 on September 10, 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.*