# DotInk: EInk Assistant — Font & Ebook Converter Tool

> E-ink font and ebook converter tool for portable readers. (iPhone/iPad app by 业 毕.)

- Source: https://appshunter.io/ios/app/dotink-eink-assistant/id6754073002 (this page in markdown: same URL + `.md`)
- Developer: [业 毕](https://appshunter.io/developer/1850598730)
- Category: Utilities, Productivity
- Price: Free with in-app purchases (on sale, was $1.99)
- Rating: 1.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 11 MB
- Languages: American English, Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2025-10-23
- Data updated: 2026-06-01
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/dotink-eink-assistant/id6754073002/reviews.md

## What is DotInk?

Designed for e-ink enthusiasts, making your portable readers more powerful and easier to use.
Seamlessly convert .ttf fonts and e-books on your phone into .bin fonts, XTC, or EPUB formats perfectly tuned for portable e-ink screens.

[CORE FEATURES]
• WYSIWYG Font Customization
Import external .ttf fonts or use system fonts. Adjust line spacing, tracking, size, weight, and more with precision. Real-time simulation of various e-ink screens—preview exactly how it looks before exporting.
• Powerful E-book Toolbox
Import various e-book formats to preview layouts directly on your phone. Customize formatting and convert to standard formats with a single tap.
• Seamless Device Integration
Wireless connection to supported devices for font pushing and file management. Supported Devices: XTEInk X4, EDCBook, Murphy 3.7, Wudada·Little Ink, and more.
• Privacy First & Offline
100% Offline: All processing is done locally on your device. No user data is ever uploaded. (Note: Network and Location permissions are required solely for connecting to your e-ink hardware.)

[NOTE FROM DEVELOPER]
This app is an indie project built with "AI Vibe Coding." While I strive for perfection, I cannot test every scenario. If you encounter any bugs, I appreciate your understanding.
Thank you to all the "Community Supporters" for your feedback! Feel free to leave suggestions or comments.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Key features

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

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Monthly Pro | $0.99 | per month |
| Yearly Pro | $5.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime Pro | $14.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/dotink-eink-assistant/id6754073002/reviews.md

### 1/5 — Cannot transfer files

*2025-12-30*

The app connects to my X4 without too much issue, but then it won’t transfer files. I tried this numerous times on multiple networks, different settings, and no dice. Unfortunately, I may have to just refund.

**Developer response:** Thanks for your feedback!

I’ve also been able to reproduce the XTEInk file transfer failure issue on iOS 26, and have attempted to fix it in the upcoming version 2.0.2.

Since this app is not officially supported software, I can’t guarantee that the file management feature will work 100% reliably at all times (though I’ll do my best to keep it functional). If this is a critical requirement for you, please request a refund.

Feel free to reach out to me anytime if you need further assistance: biyebaby@icloud.com. 

Have a great day!

## Frequently asked questions about DotInk

### What is DotInk: EInk Assistant?

DotInk: EInk Assistant is a utility app designed to enhance the functionality of portable e-ink readers. It allows users to customize fonts and convert e-books into formats optimized for these devices.

### Does DotInk: EInk Assistant have ads?

No, DotInk: EInk Assistant does not contain advertisements. The developer has indicated that the app is ad-free.

### What devices does DotInk: EInk Assistant support?

DotInk: EInk Assistant supports a range of e-ink devices including XTEInk X4, EDCBook, Murphy 3.7, and Wudada·Little Ink, among others. It also runs on iPhone, iPad, and iPod.

### How does DotInk: EInk Assistant handle user data?

DotInk: EInk Assistant prioritizes user privacy by operating 100% offline. All processing is done locally on the device, and no user data is ever uploaded.

### What are the subscription options for DotInk: EInk Assistant?

DotInk: EInk Assistant offers a 'Monthly Pro' subscription for $0.99 per month and a 'Yearly Pro' subscription for $5.99 per year. These plans likely unlock additional features or remove limitations.

### How often is DotInk: EInk Assistant updated?

The latest version of DotInk: EInk Assistant is 2.1.2, which was released on February 18, 2026. Updates are released periodically to improve functionality and address bugs.

### What is the age rating for DotInk: EInk Assistant?

DotInk: EInk Assistant has an age rating of 4+. This indicates it is suitable for users aged four and older, with no mature content.

### What formats can DotInk: EInk Assistant convert ebooks to?

DotInk: EInk Assistant can convert e-books into standard formats suitable for portable e-ink screens. Specific output formats mentioned include .bin fonts, XTC, and EPUB.

## Version history (last 5 releases)

### 2.1.2 — 2026-02-18

- [Beta] Added support for CrossPoint firmware: includes 4-bit font generation and file management features.
- Font Module: You can now customize preview content in the preview settings.
- eBook Module: Added a second confirmation step for styling when pushing from Kindle devices.
- Fix: Resolved pagination issues during book preview and the endless loading bug when adjusting parameters.
- Fix: Addressed an issue where the paywall could still appear after subscribing and purchases couldn’t be restored.

### 2.1.1 — 2026-02-02

- New Device Support : Added full compatibility for XTEink X3 in both Font and Ebook modes.
- New Onboarding Experience : Introduced a brand-new welcome guide to help you set up permissions and select your preferred usage scenarios and devices.
- Kindle Support : Now supports Kindle devices! You can seamlessly convert and transfer ebooks directly to your Kindle.
- Bug Fix : Addressed a vertical alignment issue where generated fonts might appear jittery on EDCBook .
- Now Free to Download : We have transitioned to a Freemium model. The app is now free to download with daily limits, while the new Pro Subscription unlocks unlimited access.

### 2.1.0 — 2026-01-30

- New Device Support : Added full compatibility for XTEink X3 in both Font and Ebook modes.
- New Onboarding Experience : Introduced a brand-new welcome guide to help you set up permissions and select your preferred usage scenarios and devices.
- Kindle Support : Now supports Kindle devices! You can seamlessly convert and transfer ebooks directly to your Kindle.
- Bug Fix : Addressed a vertical alignment issue where generated fonts might appear jittery on EDCBook .
- Now Free to Download : We have transitioned to a Freemium model. The app is now free to download with daily limits, while the new Pro Subscription unlocks unlimited access.

### 2.0.2 — 2026-01-08

1. New Feature: Expanded Ebook module with support for EDCBook devices. Import TXT/EPUB and export TXT books with Table of Contents (TOC) for easy device transfer.
2. New Feature: Enhanced iOS 26 integration with Dynamic Island and Live Activities. Track the progress of long tasks directly from your Lock Screen.
3. UI Optimization: Modernized interface with the iOS 26 "Liquid Glass" aesthetic for a premium visual experience.
4. Bug Fix: Resolved file upload failures on XTEINK devices specifically for users on iOS 26.
5. Bug Fix: Improved memory management to eliminate crashes when generating ultra-large files.

### 2.0.1 — 2026-01-02

This update fixes an issue on iOS 26 where fonts could not be exported, and includes the following new features and improvements:

1. New eBook Mode (Beta)
	• Supports importing EPUB and TXT files with in-app preview.
	• Freely adjust layout, font size, and fonts, with support for exporting to XTC or EPUB formats.

2. Deep Compatibility with EDCBook v1.4.2
	• Full support for font preview, adjustment, and generation of .bin fonts on this firmware version.
	• Supports connecting to the device for file management and device settings configuration.

3. XTEInk “Wi-Fi Collaboration” Mode Now Available
	• No longer limited to hotspot connections. Devices can now connect directly over a local network in supported environments.
	• Fixes issues where connection failures or transfer errors could occur after firmware updates.

4. Experience and Interaction Improvements
	• Memory feature: Automatically restores the last browsing position and parameter settings after restarting the app.
	• Preset management: Save your preferred font adjustment settings as presets for quick access.
	• Interface folding: Allows collapsing rarely used control sections for a cleaner, more focused interface.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*