Best Dewey Decimal Apps

250+ iOS apps curated and reviewed

4.4 avg rating

20 free apps

Updated October 2026

Out of 250+ dewey decimal apps on iOS, 20 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.

Compare top Dewey Decimal Apps (October 2026)

#	App	Price	Rating	Ads	In-App Purchases	Updated
1	Decimator	Free	4.3★ (3)	No	No	May 2026
2	LibraryTools.com	Free	5.0★ (3)	No	No	Jul 2026
3	Ex Libris Lookup	Free	—	No	Yes	Aug 2026
4	iCollect Books: Library List	Free	4.6★ (4.1K)	No	Yes	Oct 2026
5	MyLibraryList Free	Free	4.0★ (2)	No	No	May 2026
6	LibraryThing	Free	3.5★ (278)	No	No	Oct 2026
7	Book Catalog: Bookshelf	Free	4.0★ (1)	No	Yes	Sep 2026
8	CLZ Books - library organizer	Free	4.8★ (2.6K)	No	Yes	Oct 2026

Top Picks for Dewey Decimal

#1

Decimator by Kosada Incorporated

Editor's Choice

🛍️ Shopping

4.3(3 ratings)

Free

Decimator screenshot 1

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Easily find Dewey Decimal numbers with this offline app. It supports multiple languages and allows browsing and searching for classification codes.

#2

LibraryTools.com by John White

Strong Contender

5.0(3 ratings)

Free

LibraryTools.com screenshot 1

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This educational app offers a gamified approach to mastering library classification systems. It features interactive games for both Library of Congress and Dewey Decimal systems, aiding in training library assistants.

#3

Ex Libris Lookup by Garst Peterson

Every book, by the numbers.

Worth Considering

📚 Books

0.0(0 ratings)

FreeIn-App Purchases

Ex Libris Lookup screenshot 1

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More Dewey Decimal apps to explore

iCollect Books: Library List

iCollect Books: Library List

iCollect Books: Library List

Organize a classroom bookshelf

Organize and manage any book collection, from personal libraries to classroom inventories. Features include barcode scanning, cloud backup, and cross-device syncing. Customize layouts and export your data.

Manage and inventory any bookBarcode scanning and database searchCloud backup and sync across devices

free with in-app purchases

MyLibraryList Free

MyLibraryList Free

MyLibraryList Free

by David O'Brien

Organize your library book lists with this app. It helps you track books by their shelf order using the Dewey Decimal Classification system. Find books more easily with its shelf location guidance.

Organize library book listsShelf order displayDewey Decimal Classification support

Catalog your books and media

Catalog your personal book, DVD, and CD collections. Easily add items by searching or scanning barcodes. Enhance your catalog with high-resolution cover photos and browse your collection visually.

Catalog books, DVDs, and CDsSearch for media itemsScan ISBN barcodes

Book Catalog: Bookshelf

Book Catalog: Bookshelf

Book Catalog: Bookshelf

Scanner for your home library

Easily catalog, track, and review your book collection. Scan barcodes or search to automatically import book details, manage your reading lists, and find books in your library. Your data is securely stored in iCloud.

Barcode scanning for book detailsAutomatic title, author, and cover importManage 'want to read' lists

CLZ Books - library organizer

CLZ Books - library organizer

CLZ Books - library organizer

Just scan ISBN barcodes

Easily catalog your book collection by scanning ISBN barcodes or searching by author and title. Automatically retrieve book details, values, and cover art. Organize your library with customizable views, multiple collections, and cloud syncing.

Scan ISBN barcodes for automatic data retrievalSearch by author and titleAutomatic book details, values, and cover art

Stacked - Library Management

Stacked - Library Management

Stacked - Library Management

by Neuvo WebTech LLP

📊 Productivity

Librarian BookShelf

Librarian BookShelf

Librarian BookShelf

A K Smiley Public Library

A K Smiley Public Library

A K Smiley Public Library

A.K. Smiley Public Library

xLibrary - Home Collection

xLibrary - Home Collection

xLibrary - Home Collection

Track your books & reading

Campbell County Public Library

Campbell County Public Library

Campbell County Public Library

ISBN Book Manager

ISBN Book Manager

ISBN Book Manager

Scan, Catalog & Track Profit

by SIDDHARTH H BHONSLE

Bookworm Library

Bookworm Library

Bookworm Library

by Scott Julian

📊 Productivity

Shelf scanner & banned index

Easily catalog your book collection by scanning barcodes or photographing shelves. Track your reading, manage wishlists, and discover new books. Features include duplicate detection, lending tracking, and collection valuation.

Barcode scanning for quick catalogingShelf scanning to add multiple books at onceDuplicate book detection

Library Manager

Library Manager

Library Manager

For school library

VerseVault Book

VerseVault Book

VerseVault Book

by Remington Sloane

FAQ about Dewey Decimal

What are the best dewey decimal apps for iPhone?

Decimator tops our dewey decimal apps ranking as of October 2026, with a 4.3-star average from 3 App Store ratings, and it's free to download.

Are there free dewey decimal apps for iPhone?

Yes — 20 of the top dewey decimal apps we rank are free to download, including Decimator and LibraryTools.com.

Does Decimator have ads or in-app purchases?

Decimator has no ads and has no in-app purchases, according to its App Store listing as of October 2026.

How many dewey decimal apps are on the App Store?

We track 250+ dewey decimal apps on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.