# Send to Kindle by KTool — Substack, Newsletter, RSS

> Send web content and documents to Kindle for offline reading. (iPhone/iPad app by Long Nguyen Hai.)

- Source: https://appshunter.io/ios/app/send-to-kindle-by-ktool/id1620426799 (this page in markdown: same URL + `.md`)
- Developer: [Long Nguyen Hai](https://appshunter.io/developer/1620426801)
- Category: Magazines & Newspapers, News
- Price: Free with in-app purchases
- Rating: 2.80/5 from 9 App Store ratings · 8 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 19 MB
- Languages: American English
- Released: 2022-04-24
- Data updated: 2026-09-02
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/send-to-kindle-by-ktool/id1620426799/reviews.md

## What is Send to Kindle by KTool?

KTool.io: Send web articles, newsletters and RSS to Kindle. Build a reading habit with KTool today!

You spend too much time on computer screens. It damages our eyesight and hurts our comprehension.

KTool helps you read everything on Kindle instead.

Less eyestrain. More focus 

———

H O W    T O    U S E

Installing this app will add a KTool Share Target to your mobile phone. Share articles with KTool Share Target to read them on your Kindle.

Send long web articles to your Kindle to read later. Read anywhere: on your Kindle e-reader or the Kindle app on your smartphone (any platform). Articles are available for offline reading once delivered to the Kindle.

———

F E A T U R E S

— New: Send documents to Kindle (PDF, DOCX and EPUB)
— Add articles to Daily Read or Weekly Read
— Read newsletter on Kindle
— Send Wikipedia articles to Kindle
— Send Hacker News discussions to Kindle
— Dark Mode

— Speedy delivery to your Kindle
— Support articles behind paywalls
— Image support
— Emoji support
— Keyboard short-cut support
— Read Twitter threads on Kindle
— Read RSS on Kindle (WIP)

KTool can send to the following devices:

—  Kindle e-readers sold by Amazon
—  iPhone/iPad Kindle app
—  Kindle app on other platforms

———

T E S T    D R I V E

You can test KTool's functionality without install the plugin by using this web portal: https://ktool.io/read-on-kindle

Example articles:

1. The saddest “just ship it” story (2020)
https://kitze.io/posts/saddest-just-ship-it-story-ever

2. Substack’s Ideology
https://every.to/divinations/substack-s-ideology

———

C O N T A C T

KTool: https://ktool.io
Support: daniel (at) podzim.co
Twitter: https://twitter.com/ktool_io

———

P R I V A C Y

This extension does not do anything unless you click the Send to Kindle button. We do not monitor or inject any scripts into your pages while you browse.

When you click the Kindle icon, this extension sends the contents of the page and its URL to the KTool service. The KTool service then packages the contents into a reader-ready format and delivers it to your Kindle.

Content which you process with the KTool service will be cached on the server for a short period.

More information on our privacy page: https://ktool.io/privacy. Feel free to contact us if you have any questions.

T E R M S  O F  U S E

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

## Key features

- Send web articles to Kindle
- Read newsletters on Kindle
- Send documents (PDF, DOCX, EPUB)
- Offline reading on Kindle
- Supports Kindle e-readers and apps
- Dark Mode

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Unlimited articles | $59.99 | per year |
| Unlimited Access | $99.99 | per year |
| Unlimited Articles | $5.99 | per month |
| Unlimited Access | $9.99 | per month |
| Unlimited Articles | $2.99 | per month |
| iOS Unlimited Articles | $29.99 | per year |


## Recent user reviews (8 of 8)

All indexed reviews: https://appshunter.io/ios/app/send-to-kindle-by-ktool/id1620426799/reviews.md

### 5/5 — приложение работает!

*2025-10-30*

приложение работает в 2025 году с книгами Киндл. чтобы отправить книгу на читалку добавьте на сайте амазон почту этого приложения (его вы найдете при попытке отправить книгу когда придет письмо с блокировкой отправки). после аппрува книжки быстро долетают в читалку. супер удобно! и любого размера без всяких подписок и доплат) пользуйтесь!

### 1/5 — Must pay to use

*2025-03-02*

I logged in and attempted to send the first article. Immediately, I got an error that my “free trial had ended” and I needed to upgrade to send a PDF to Kindle. Not much of a free trial!

**Developer response:** Sorry there was a bug in the iOS authentication module. Can you share your email address so I could update your account? My email daniel@ktool.io

Thanks

### 3/5 — Rss is not possible

*2024-12-27*

The rss feeds are not working

**Developer response:** Hi. Due to high number of abuse, I no longer offer RSS feature for free. Please upgrade your account to use it. Thanks

### 1/5 — Waste of time

*2024-05-18*

Simple login also doesn’t work. If i request password change it just keeps saying passwords don’t match in a loop

**Developer response:** Sorry for the issue. The bug has been fixed. Thanks

### 1/5 — Does not work

*2024-04-06, version 1.8.3*

I did all I was supposed to but my file is not in my PDF

### 1/5 — Doesn’t work

*2024-01-27, version 1.8.3*

Doesn’t do what it’s supposed to do.

### 1/5 — Não consigo enviar nenhum artigo

*2023-12-27*

Na hora que eu tento envia da erro, pede pra eu contatar o suporte, mas não tem nada onde possa falar.

**Developer response:** Hi Raul. I’ve removed the flag on your account immediately and sent you an email to inform about it.

Unless you’re using multiple free account to abuse my service, you should be able to use the app without a problem.

### 5/5 — Incrível

*2023-11-09*

Melhor maneira de enviar artigos, documentos, newsletters para ler no Kindle. Ainda tem opção de converter os texto para o estilo ADHD. Vale cada centavo para ler textos em uma tela com menos luz.

**Developer response:** Thank you 😊

## Frequently asked questions about Send to Kindle by KTool

### How do I send content to Kindle with KTool?

Install the KTool Share Target on your mobile device. When you find an article or document you want to read, share it with KTool. The content will then be sent to your Kindle for offline reading.

### What types of content can KTool send to Kindle?

KTool can send web articles, newsletters, RSS feeds, and documents such as PDFs, DOCX, and EPUB files to your Kindle.

### Can I read content on my phone's Kindle app using KTool?

Yes, KTool supports sending content to the Kindle app on iPhone/iPad and other platforms, allowing you to read articles offline on your smartphone.

### Does KTool support articles behind paywalls?

Yes, KTool has support for sending articles that are behind paywalls, allowing you to access and read them on your Kindle.

### What are the subscription options for KTool?

KTool offers several subscription plans, including 'Unlimited Articles' and 'Unlimited Access', with various monthly and yearly options. Many plans include free trial periods of 3 or 7 days.

### Is KTool free to use?

The base functionality of KTool is free to use. However, there are in-app purchases available for subscription plans that offer unlimited articles and access.

### How often is KTool updated?

The latest version of KTool is 1.8.3, and it was last updated on September 3, 2023. This indicates regular updates to improve functionality and add features.

### What is the age rating for KTool?

KTool has an age rating of 4+, making it suitable for a wide range of users, including younger individuals who may be learning to read or developing a reading habit.

## Version history (last 5 releases)

### 1.8.3 — 2023-09-03

- New: added support for comic sites: XKCD, Least I Could Do, questionablecontent.net...
- New: added Custom Magazine management
- General bug fixes & improvements

### 1.8.1 — 2023-04-25

- New: ADHD Reader Mode — helps you read faster by highlighting beginning of every word of the article
- New: Added new parser for newsletters including Substack, Morning Brew and The Bytes newsletter 
- New: Added new parser for LessWrong.com 
- Fix: general bug fixes and improvements
- New: Added "Account Deletion" functionality

### 1.8.0 — 2023-04-18

- New: Sign in with Apple
- New: Allow sending articles to Custom Magazine
- New: Added Articles Search 
- New: ADHD Reader Mode — helps you read faster by highlighting beginning of every word of the article
- New: Added new parser for newsletters including Substack, Morning Brew and The Bytes newsletter 
- New: Added new parser for LessWrong.com 
- Fix: general bug fixes and improvements

### 1.6.8 — 2023-02-23

- Hotfix: fix issue where the app show "Unsupported file type" when sharing content from other apps such as Twitter or Readwise Reader...

### 1.6.7 — 2023-02-16

- New: Send documents to Kindle via KTool (supports PDF, DOCX and EPUB)
- Improvement: Faster app's startup time
- Fix: Fix authentication issues for some users

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## Related topics

[send to kindle by ktool](https://appshunter.io/ios/topics/send-to-kindle-by-ktool) · [send to kindle](https://appshunter.io/ios/topics/send-to-kindle) · [send to kindle app](https://appshunter.io/ios/topics/send-to-kindle-app)

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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 2026-09-02.*