# Satori Reader vs Delatsch Choke Calculator

The clearest difference is price: Satori Reader at Free against Delatsch Choke Calculator's $8.99. Satori Reader also leads on update cadence (every 3 months vs every 20 months). Delatsch Choke Calculator's advantage is in-app purchases (none vs 8). On ads, device support and iOS requirement there is nothing between them.

Satori Reader is free to download; Delatsch Choke Calculator costs $8.99 up front. Satori Reader sells 3 in-app purchases, starting at $8.99 per month. Delatsch Choke Calculator asks for nothing beyond the download.

Satori Reader ships an update every 3 months, Delatsch Choke Calculator every 20 months. The most recent releases landed on November 12, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Satori Reader | Delatsch Choke Calculator |
| --- | --- | --- |
| Price | **Free** | $8.99 |
| Rating | **[4.8 (219 ratings)](https://appshunter.io/ios/app/satori-reader/id1382950847/reviews)** | — |
| Number of ratings | **219** | — |
| Positive reviews | 90.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 20 months |
| Monetization | Free with in-app purchases | — |
| Size | 81 MB | 1 MB |
| Requires iOS | 15.0 | **14.2** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Brak Software, Inc.](https://appshunter.io/developer/304088759) | [Marko Delac](https://appshunter.io/developer/1500812309) |

## What reviewers say

### Satori Reader

[App page](https://appshunter.io/ios/app/satori-reader/id1382950847)

Enhance your Japanese reading and listening skills with engaging stories written by native speakers. Features adaptive kanji, smart definitions, and spaced repetition to build vocabulary. Get clarity with friendly annotations and human feedback.

**Highlights:** Compelling stories by native speakers, Audio narration by voice actors, Adaptive kanji presentation, Smart word definitions, Friendly annotations, Spaced repetition vocabulary review, Human feedback and support

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Satori Reader Monthly | $8.99 | per month |
| Satori Reader Annual | $89.99 | per year |
| Satori Reader Annual | $89.99 | per year |

**What reviewers like**

- 🚀 Excellent for improving reading and listening skills
- 👍 Detailed grammar and vocabulary explanations
- 🎨 Customizable display settings for kanji/furigana
- 💡 Integrated spaced repetition flashcard system
- 🎧 High-quality voice acting and audio

**What reviewers complain about**

- 🐛 Occasional app crashes or sync issues
- 🕰️ Lack of speed control for audio playback
- 💰 Subscription-based model can be expensive
- 🔍 Limited search/navigation functionality

**Reported bugs**

- Login issues and account creation problems
- Syncing and loading delays on some devices

**Requested features**

- Dark mode option
- Ability to loop audio playback
- Kanji lookup/learning tools integration
- More advanced/diverse content selection


### Delatsch Choke Calculator

[App page](https://appshunter.io/ios/app/delatsch-choke-calculator/id1521907575)

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

**In-app purchases:** none


## Frequently asked questions

### Is Satori Reader free?

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

### Is Delatsch Choke Calculator free?

Delatsch Choke Calculator costs $8.99, with no in-app purchases.

### Do Satori Reader or Delatsch Choke Calculator have ads?

Neither Satori Reader nor Delatsch Choke Calculator shows ads.

### Which is updated more often, Satori Reader or Delatsch Choke Calculator?

Satori Reader ships an update every 3 months, and Delatsch Choke Calculator every 20 months. Most recently, Satori Reader was updated on November 12, 2026 and Delatsch Choke Calculator on November 3, 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.*