# Flash Reader vs Knowix, LLC

The clearest difference is in-app purchases: Knowix, LLC at none against Flash Reader's 10. Knowix, LLC also leads on iOS requirement (13.0 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Flash Reader sells 9 in-app purchases, starting at $4.99 per month. Knowix, LLC asks for nothing beyond the download.

Flash Reader ships an update every 6 weeks, Knowix, LLC every 3 months. The most recent releases landed on November 13, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Flash Reader | Knowix, LLC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (164 ratings)](https://appshunter.io/ios/app/flash-reader-speed-reading/id402491178/reviews)** | — |
| Number of ratings | **164** | — |
| Positive reviews | 49.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 23 MB | 43 MB |
| Requires iOS | 26.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Didstopia](https://appshunter.io/developer/379028611) | [Knowix, LLC](https://appshunter.io/developer/1661221233) |

## What reviewers say

### Flash Reader

[App page](https://appshunter.io/ios/app/flash-reader-speed-reading/id402491178)

Enhance your reading speed and comprehension with this app. It presents text one word at a time, in chunks, or as a traditional reader, allowing you to adjust speed and track progress. Supports various file types and offers a free tier with an optional Pro upgrade.

**Highlights:** Word-by-word reading mode, Chunk reading mode, Traditional reader mode, Adjustable reading speed, Supports PDFs, EPUBs, Word files, Camera scanning for text, Siri integration

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $4.99 | per month |
| Pro Annual | $29.99 | per year |
| Flash Reader Pro | $0.99 | one-time |
| Flash Reader Pro | $1.99 | one-time |
| Flash Reader Pro | $2.99 | one-time |
| Flash Reader Pro | $3.99 | one-time |
| Flash Reader Pro | $4.99 | one-time |
| Pro Lifetime | $39.99 | one-time |
| Pro Lifetime | $79.99 | one-time |

**What reviewers like**

- 🚀 Ahead of its time
- 👍 Simple to use
- 🚀 Helps read books efficiently
- 👍 Useful, easy to use
- 👍 Brilliant app, great time saver

**What reviewers complain about**

- 🐛 Doesn't allow to open modern websites
- 🐛 Restarts the book being read
- 🐛 Crashes when using camera
- 🐛 Bugs and stops working
- 🐛 Loses reading progress

**Reported bugs**

- Login screen freezes
- Incompatible with older devices
- Crashes when switching modes
- Loses reading progress
- Inaccurate resume times

**Requested features**

- Fancy text like newer video captions
- Bookmarks and navigation
- Support for Google Drive
- Quick rewind option
- Table of contents


### Knowix, LLC

[App page](https://appshunter.io/ios/app/knowix-llc/id1661221231)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Flash Reader free?

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

### Is Knowix, LLC free?

Knowix, LLC is free to download, with no in-app purchases.

### Do Flash Reader or Knowix, LLC have ads?

Neither Flash Reader nor Knowix, LLC shows ads.

### Which is updated more often, Flash Reader or Knowix, LLC?

Flash Reader ships an update every 6 weeks, and Knowix, LLC every 3 months. Most recently, Flash Reader was updated on November 13, 2026 and Knowix, LLC on November 7, 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.*