# CogniLens vs Flumen

The clearest difference is update cadence: Flumen at every 9 days against CogniLens's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. CogniLens sells 2 in-app purchases, starting at $5.00 per month and Flumen sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

CogniLens ships an update every 3 weeks, Flumen every 9 days. The most recent releases landed on October 7, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | CogniLens | Flumen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cognilens/id6757313568/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | Freemium | — |
| Size | 90 MB | 16 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Cognition Labs](https://appshunter.io/developer/1671250656) | [Mathias Jaeger-Pedersen](https://appshunter.io/developer/1848104509) |

## What reviewers say

### CogniLens

[App page](https://appshunter.io/ios/app/cognilens/id6757313568)

This app transforms text to make it more readable for individuals with dyslexia and ADHD. Customize spacing, size, and layout, or use text-to-speech. It supports document uploads, text pasting, and photo scanning.

**Highlights:** Text transformation for readability, Customizable layout and spacing, Text-to-speech functionality, Document upload and text pasting, Photo scanning for text conversion, Light/dark mode and focus controls

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CogniLens Monthly | $5.00 | per month |
| CogniLens Yearly | $54.00 | per year |


### Flumen

[App page](https://appshunter.io/ios/app/flumen-ebook-reader/id6776182656)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Flumen Pro | $6.99 | one-time |


## Frequently asked questions

### Is CogniLens free?

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

### Is Flumen free?

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

### Do CogniLens or Flumen have ads?

Neither CogniLens nor Flumen shows ads.

### Which is updated more often, CogniLens or Flumen?

CogniLens ships an update every 3 weeks, and Flumen every 9 days. Most recently, CogniLens was updated on October 7, 2026 and Flumen on October 22, 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.*