# ARKS TS vs Immersion Reader

The clearest difference is in-app purchases: ARKS TS at none against Immersion Reader's 1. Immersion Reader's advantage is update cadence (every 6 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Immersion Reader sells 1 one-off in-app purchase. ARKS TS asks for nothing beyond the download.

ARKS TS ships an update monthly, Immersion Reader every 6 days. The most recent releases landed on October 13, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | ARKS TS | Immersion Reader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (27 ratings)](https://appshunter.io/ios/app/immersion-reader/id6443721334/reviews)** |
| Number of ratings | — | **27** |
| Positive reviews | — | 61.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 6 days** |
| Monetization | — | Free with in-app purchases |
| Size | 30 MB | 80 MB |
| Requires iOS | 13.4 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [AGREEFY TECHNOLOGIES LLP](https://appshunter.io/developer/1280878923) | [Mathew Chan](https://appshunter.io/developer/1441199099) |

## What reviewers say

### ARKS TS

[App page](https://appshunter.io/ios/app/arks-ts/id1645043642)

**Features:** macOS Compatibility

**In-app purchases:** none


### Immersion Reader

[App page](https://appshunter.io/ios/app/immersion-reader/id6443721334)

Easily look up Japanese words while reading ebooks with a single tap. Import custom dictionaries and export saved vocabulary for spaced repetition learning. Offers customizable themes for a comfortable reading experience.

**Highlights:** One-tap word lookup in Japanese ebooks, Import Yomichan and frequency dictionaries, Export vocabulary to Anki, Light and dark mode themes, Lookup neighboring words

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Immersion Reader Premium | $4.99 | one-time |


## Frequently asked questions

### Is ARKS TS free?

ARKS TS is free to download, with no in-app purchases.

### Is Immersion Reader free?

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

### Do ARKS TS or Immersion Reader have ads?

Neither ARKS TS nor Immersion Reader shows ads.

### Which is updated more often, ARKS TS or Immersion Reader?

ARKS TS ships an update monthly, and Immersion Reader every 6 days. Most recently, ARKS TS was updated on October 13, 2026 and Immersion Reader on October 24, 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.*