# Kioku vs DocReader

The clearest difference is update cadence: Kioku at every 2 days against DocReader's every 3 weeks. DocReader's advantage is device support (3 vs 1) and iOS requirement (16.4 vs 26.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Kioku ships an update every 2 days, DocReader every 3 weeks. The most recent releases landed on September 29, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Kioku | DocReader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/docreaderpdfebooktextospeech/id6763090864/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 3 weeks |
| Monetization | — | Free |
| Size | 51 MB | 124 MB |
| Requires iOS | 26.0 | **16.4** |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Kai Kang](https://appshunter.io/developer/1757164832) | [Emmanuel Adooli](https://appshunter.io/developer/1654673386) |

## What reviewers say

### Kioku

[App page](https://appshunter.io/ios/app/kioku-private-second-brain/id6762234661)

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

**In-app purchases:** none


### DocReader

[App page](https://appshunter.io/ios/app/docreaderpdfebooktextospeech/id6763090864)

This app allows you to read PDFs and EPUBs offline, with a text-to-speech feature that reads content aloud. It offers customizable reading settings and supports various file formats, keeping your library local.

**Highlights:** Offline PDF and EPUB reading, Text-to-speech with highlighting, Customizable reading comfort settings, Local library management, Support for various file formats, On-device OCR for scanned PDFs

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Kioku free?

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

### Is DocReader free?

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

### Do Kioku or DocReader have ads?

Neither Kioku nor DocReader shows ads.

### Which is updated more often, Kioku or DocReader?

Kioku ships an update every 2 days, and DocReader every 3 weeks. Most recently, Kioku was updated on September 29, 2026 and DocReader 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.*