# Bookoscope - OPDS crawler — Public domain ebooks and more

> Ebook catalog crawler for OPDS servers and public domain classics. (iPhone/iPad app by Isaac Lyman.)

- Source: https://appshunter.io/ios/app/bookoscope-opds-crawler/id6476512234 (this page in markdown: same URL + `.md`)
- Developer: [Isaac Lyman](https://appshunter.io/developer/1644594506)
- Category: Books, Utilities
- Price: $2.99
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 12+
- Requires: iOS 13.0 · 35 MB
- Languages: American English
- Released: 2024-02-15
- Data updated: 2026-08-19
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/bookoscope-opds-crawler/id6476512234/reviews.md

## What is Bookoscope?

Bookoscope is a fast, searchable ebook catalog. With Bookoscope, you can browse your own self-hosted ebook library as well as download public domain classics from Project Gutenberg.

FEATURES:
- Fast
- Easy on the eyes
- Includes over 70,000 public domain books from Project Gutenberg
- Uses cached feeds (refresh on demand)
- Searchable by any available metadata
- Quick download and export to the ereader of your choice

COMPATIBLE WITH:
- Calibre-web
- Kavita
- Ubooquity
- Any ebook server with OPDS 1.0 functionality

WHY USE BOOKOSCOPE?

Some ereader apps can connect to OPDS endpoints, but the functionality is tucked away and awkward. There's no way to browse and search all the ebooks you have access to, all at once.

Bookoscope fills that niche. It crawls your OPDS endpoints, finds and caches all the books it can, and lets you easily download any of them to your device. From there, you can export them to your preferred ereader.

BOOKOSCOPE IS NOT:
- An ebook reader, sync client, or annotator, like Apple Books, Google Books, or Kindle.
- A metadata editor or organizer, like Calibre.
- A self-hosted ebook server, like Kavita, Ubooquity, or calibre-web.

Bookoscope may be used with any of the above, but is not affiliated with any other app or tool.

WHAT IS OPDS?  

OPDS is the open standard for web endpoints that expose catalogs of ebooks. Many people use home OPDS servers for their personal ebook libraries.

WHAT IF I DON'T HAVE AN OPDS SERVER?

That's okay! You can use Bookoscope to browse and download free, completely legal books in the public domain. Start with classics like:
- Moby Dick
- Frankenstein
- Pride and Prejudice
- The Great Gatsby
- The complete works of William Shakespeare, Charles Dickens, Frederick Douglass, and more!

## Key features

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

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/bookoscope-opds-crawler/id6476512234/reviews.md

### 1/5 — Doesn’t work at all

*2024-08-26*

Did nothing to open books.

**Developer response:** It might help to read the app description. Bookoscope is not an ereader; it’s an OPDS catalog search tool.

## Frequently asked questions about Bookoscope

### What is Bookoscope?

Bookoscope is an ebook catalog crawler that allows you to browse your self-hosted ebook library via OPDS endpoints or download public domain classics. It caches book data for fast searching and quick export to your ereader.

### Does Bookoscope have ads?

No, Bookoscope does not contain advertisements. It is a paid application available for $2.99.

### What devices is Bookoscope compatible with?

Bookoscope is compatible with iPhone, iPad, and iPod devices. It is designed to work with any ebook server that supports OPDS 1.0 functionality.

### How many public domain books are included with Bookoscope?

Bookoscope includes access to over 70,000 public domain books from Project Gutenberg, featuring classics like Moby Dick, Frankenstein, and works by Shakespeare.

### Can I read books directly in Bookoscope?

No, Bookoscope is not an ebook reader. It functions as a catalog and downloader, allowing you to export books to your preferred ereader application.

### How often is Bookoscope updated?

The latest version, 1.5.0, was released on December 29, 2024. Updates are provided by the developer, Isaac Lyman.

### What is the age rating for Bookoscope?

Bookoscope has an age rating of 12+, making it suitable for a wide range of users interested in accessing ebooks.

### What is OPDS and why is it important for Bookoscope?

OPDS (Open Publication Distribution System) is an open standard for web endpoints that expose ebook catalogs. Bookoscope uses OPDS to connect to and crawl both personal ebook libraries and public domain sources.

## Version history (last 5 releases)

### 1.5.0 — 2024-12-29

The app now tracks titles it's seen before, in order to prioritize "New" titles when you're not searching

### 1.4.0 — 2024-05-15

Updated for compatibility with iOS 17.5

### 1.3.0 — 2024-05-13

Added a "shuffle" button to help you rediscover random books from your library

### 1.2.3 — 2024-05-05

Fixed bugs for certain HTTP authentication methods

### 1.2.2 — 2024-05-05

Fixed bugs affecting certain OPDS servers

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| --- | --- | --- | --- |
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## More apps by Isaac Lyman

- [Sootly](https://appshunter.io/ios/app/sootly/id1644594504)
- [Cypher System SRD Lookup](https://appshunter.io/ios/app/cypher-system-srd-lookup/id6467048463)

All apps by Isaac Lyman: https://appshunter.io/developer/1644594506

## Related topics

[isaac lyman](https://appshunter.io/ios/topics/isaac-lyman)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-19.*