# Bookoscope vs ADHD

The clearest difference is price: ADHD at $1.99 against Bookoscope's $2.99. Bookoscope's advantage is iOS requirement (13.0 vs 15.1). On update cadence, ads, in-app purchases and device support there is nothing between them.

Bookoscope costs $2.99 and ADHD $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Bookoscope ships an update every 5 days, ADHD every 3 days. The most recent releases landed on October 16, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Bookoscope | ADHD |
| --- | --- | --- |
| Price | $2.99 | **$1.99** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/bookoscope-opds-crawler/id6476512234/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 3 days** |
| Monetization | Paid | — |
| Size | 35 MB | 27 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Isaac Lyman](https://appshunter.io/developer/1644594506) | [MapTube AB](https://appshunter.io/developer/1806672009) |

## What reviewers say

### Bookoscope

[App page](https://appshunter.io/ios/app/bookoscope-opds-crawler/id6476512234)

Browse and download public domain ebooks or access your own self-hosted library. This app crawls OPDS endpoints, caches book data, and allows quick export to your preferred ereader.

**Highlights:** Browse self-hosted ebook libraries, Download public domain classics, Searchable by metadata, Cached feeds, Quick download and export, Compatible with Calibre-web, Kavita, Ubooquity

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

**In-app purchases:** none


### ADHD

[App page](https://appshunter.io/ios/app/adhd-reader/id6759151400)

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

**In-app purchases:** none


## Frequently asked questions

### Is Bookoscope free?

Bookoscope costs $2.99, with no in-app purchases.

### Is ADHD free?

ADHD costs $1.99, with no in-app purchases.

### Do Bookoscope or ADHD have ads?

Neither Bookoscope nor ADHD shows ads.

### Which is updated more often, Bookoscope or ADHD?

Bookoscope ships an update every 5 days, and ADHD every 3 days. Most recently, Bookoscope was updated on October 16, 2026 and ADHD on September 27, 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.*