# KO Reader vs Readarium

The clearest difference is price: Readarium at Free against KO Reader's $3.99. KO Reader's advantage is in-app purchases (none vs 1) and chart position (#8 vs unranked). On ads, device support and iOS requirement there is nothing between them.

Readarium is free to download; KO Reader costs $3.99 up front. Readarium sells 1 one-off in-app purchase. KO Reader asks for nothing beyond the download.

## The numbers

| Metric | KO Reader | Readarium |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/ko-reader/id6761862109/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 3 days |
| Monetization | Paid | — |
| Best chart rank | **#8** | — |
| Size | 26 MB | 11 MB |
| Requires iOS | 18.6 | **18.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [James Carrell II](https://appshunter.io/developer/1891816764) | [Emmanuel BORGES](https://appshunter.io/developer/387338144) |

## What reviewers say

### KO Reader

[App page](https://appshunter.io/ios/app/ko-reader/id6761862109)

**Currently charting:** #8 Top Paid · Book (US App Store)

This app transforms web articles, ebooks, and PDFs into natural-sounding speech using on-device AI. Enjoy private, offline listening with customizable voices and playback speeds. Export audio for later or read anywhere without an internet connection.

**Highlights:** On-device text-to-speech, Supports web articles, EPUB, PDF, and plain text, 53 neural voices in 9 languages, Customizable playback speed, Audio export to m4a/m4b, Offline functionality, Privacy-focused, no tracking

**In-app purchases:** none


### Readarium

[App page](https://appshunter.io/ios/app/readarium-read-it-later/id6779994178)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Offer a Coffee | $0.99 | one-time |


## Frequently asked questions

### Is KO Reader free?

KO Reader costs $3.99, with no in-app purchases.

### Is Readarium free?

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

### Do KO Reader or Readarium have ads?

Neither KO Reader nor Readarium shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*