# Decimator > Offline Dewey Decimal number lookup and search tool. (iPhone/iPad app by Kosada Incorporated.) - Source: https://appshunter.io/ios/app/decimator/id472607339 (this page in markdown: same URL + `.md`) - Developer: [Kosada Incorporated](https://appshunter.io/developer/417152887) - Category: Shopping, Reference - Price: Free - Rating: 4.30/5 from 3 App Store ratings · 9 written reviews indexed - Age rating: 4+ - Requires: iOS 8.0 · 4 MB - Languages: American English - Released: 2011-10-16 - Data updated: 2026-06-05 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/decimator/id472607339/reviews.md ## What is Decimator? Quickly and easily look up Dewey Decimal numbers. • Browse and search • Supports 10 languages • No internet required ## Key features - Dewey Decimal number lookup - Browse and search functionality - Offline access - Supports 10 languages ## Recent user reviews (9 of 9) All indexed reviews: https://appshunter.io/ios/app/decimator/id472607339/reviews.md ### 3/5 — Not enough detail *2024-12-01* I feel churlish criticising this. What it does, it does OK, but it does not do enough. The Dewey Decimal system has far more depth than is shown here and for may users, Decimator gives up just at the point things begin to get interesting! ### 3/5 — Good but needs updates *2019-04-03* I love being able to look find the Dewey decimal number for certain topics for certain books but it needs to get more detailed. So many of my books are categorized under 813 or 823 but I know there is more after the decimal point. The app won’t tell me. I have to find other resources to tell me. ### 1/5 — Not impressed *2013-03-27* I wanted to find the number for "calculus". No luck. "Vietnam War". Nope. "woodworking". Nada. I'm not sure what this app is supposed to do, but it doesn't look up dewey decimal numbers for any but the most basic topics (or one of the detailed topics it has on file, such as "International migration and colonization"). ### 5/5 — Great for What it's Meant to Do *2012-10-04* It's always nice to have Dewey in your Pocket. ### 4/5 — Great! But Search function limited *2012-09-01* Very handy while browsing at the library. Wish the search function would include more than just the official categories. For example, including 'cheetahs' instead of just mammals. Searching for 'cheetahs' should direct you to the mammals section instead of giving 'no results' ### 4/5 — Searchable Dewey! *2012-07-27* I very much appreciate being able to search by topic or Dewey number. I've spent 30 years in libraries using the Library of Congress classification system, and am now re-learning the Dewey system. I could have used this app at work yesterday, but am happy to now have it in my toolkit. If this app was updated to be optimized for the iPad Retina display, I would give it 5 stars. ### 2/5 — The first thing I looked for was FILM *2012-05-23* I must have misunderstood. This app will not help me find a book in the library, at least not readily. I searched for a book titled Film but first I had to know that film belongs to Arts and recreation. That makes sense. Then I had to know the subcategory, I picked sports games and entertainment thinking it might be one of those. Next I had to pick from another large group of options and since I already knew that the book would be in the 791 range I picked Public performances because you can't watch a film in private. Ah...there it is, Motion Pictures. Goodbye free app, it was a brief relationship. ### 5/5 — Works Like 793.8 *2012-03-23* Magic! ### 5/5 — Nice and useful app *2011-11-11* I would never have known the dewey decimal number for the Arabian peninsula /for free/ without this app. ## Frequently asked questions about Decimator ### Does Decimator have ads? No, Decimator does not contain advertisements. ### What is the price of Decimator? Decimator is available for free. ### What devices is Decimator compatible with? Decimator is compatible with iPhone and iPod devices. ### How often is Decimator updated? Decimator was last updated on February 21, 2017, with version 1.3. ### What age rating does Decimator have? Decimator has an age rating of 4+. ### Can I use Decimator without an internet connection? Yes, Decimator does not require an internet connection to function. ### How many languages does Decimator support? Decimator supports 10 different languages. ### What is the user sentiment for Decimator based on ratings? Decimator has a positive user sentiment, with an average rating of 4.3 stars from 3 ratings. ## Version history (last 4 releases) ### 1.3 — 2017-02-21 This app has been updated by Apple to display the Apple Watch app icon. • When viewing a category, Decimator now shows the category's ancestors • Updated visual appearance • Added 64-bit compatibility ### 1.2 — 2012-12-18 Add iPhone 5 resolution support. Add Retina display enhanced images. ### 1.1 — 2012-03-19 Fixed slow performance when typing in the search box. ### 1.0 — 2011-10-15 No release notes. ## Apps similar to Decimator | App | Rating | Price | Category | | --- | --- | --- | --- | | [Master Services](https://appshunter.io/ios/app/master-services/id1521600080) | 5.0 (1) | Free | Shopping | | [Te Ayudo - Proveedores](https://appshunter.io/ios/app/te-ayudo-proveedores/id1500371780) | — | Free | Shopping | | [Принтуй: печать на чехлах для телефонов](https://appshunter.io/ios/app/id1228220700) | 1.0 (1) | Free | Shopping | | [Price Bot](https://appshunter.io/ios/app/price-bot/id1550741940) | — | Free | Shopping | | [RB-DIGITAL](https://appshunter.io/ios/app/rb-digital/id1592476447) | — | Free | Shopping | | [Bay Ridge Wine & Spirits](https://appshunter.io/ios/app/bay-ridge-wine-and-spirits/id1528137298) | 4.9 (16) | Free | Shopping | ## More apps by Kosada Incorporated - [Bowing Challenge](https://appshunter.io/ios/app/bowing-challenge/id1241119321) All apps by Kosada Incorporated: https://appshunter.io/developer/417152887 ## Related topics [decimator](https://appshunter.io/ios/topics/decimator) · [dewey decimal](https://appshunter.io/ios/topics/dewey-decimal) · [22lookup lite](https://appshunter.io/ios/topics/22lookup-lite) --- *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 2026-06-05.*