# OEIS Client — Browse the OEIS (oeis.org)

> Mobile interface for searching and browsing the On-Line Encyclopedia of Integer Sequences. (iPhone/iPad app by Muhammad-Sharif Moustafa.)

- Source: https://appshunter.io/ios/app/oeis-client/id1253817975 (this page in markdown: same URL + `.md`)
- Developer: [Muhammad-Sharif Moustafa](https://appshunter.io/developer/887309900)
- Category: Reference
- Price: Free
- Rating: 4.40/5 from 8 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.0 · 5 MB
- Languages: American English
- Released: 2017-06-30
- Data updated: 2026-06-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/oeis-client/id1253817975/reviews.md

## What is OEIS Client?

Search and browse the On-Line Encyclopedia of Integer Sequences (OEIS) easily from your iPhone, iPad, or iPod Touch!

Features:
- Easy-to-use app tailored for a mobile experience while retaining the essence of the OEIS.
- Free to use within the end-user license agreement of the OEIS.
- Use advanced search techniques just like on the website (such as id:A000045 to retrieve only the sequence with ID A000045 or keyword:more to find sequences that need more terms).
- Tap the Share button to share a link to the sequence.

Neither this app nor the developer are affiliated with the Online Encyclopedia of Integers (https://oeis.org).  All of the sequences and related information are retrieved from the OEIS. OEIS and THE ON-LINE ENCYCLOPEDIA OF INTEGER SEQUENCES are trademarks of The OEIS Foundation Inc. More information can be found at http://oeisf.org.

## Key features

- Mobile OEIS browsing
- Advanced search techniques
- Share sequence links
- User-friendly interface
- Free to use

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/oeis-client/id1253817975/reviews.md

### 5/5 — Crashes

*2025-03-22, version 4.0.0*

App immediately crashes

### 1/5 — Crashes

*2025-03-15, version 4.0.0*

All versions of this (iOS, macOS) crash.

### 5/5 — Expected not to find this

*2021-07-11, version 4.0.0*

Thank for putting a OEIS app on the app store. Clean, simple, and well designed. Thanks

### 5/5 — Great app.

*2017-08-06, version 1.0.3*

It does it's job.

## Frequently asked questions about OEIS Client

### What is OEIS Client?

OEIS Client is a mobile application that allows users to easily search and browse the On-Line Encyclopedia of Integer Sequences (OEIS) directly from their iPhone, iPad, or iPod Touch. It provides a mobile-optimized experience for accessing mathematical sequence data.

### Is OEIS Client free to use?

Yes, OEIS Client is free to use, in accordance with the end-user license agreement of the OEIS. There are no in-app purchases or advertisements within the application.

### Can I perform advanced searches with OEIS Client?

Yes, the app supports advanced search techniques similar to the OEIS website. You can search by ID (e.g., id:A000045) or by keywords (e.g., keyword:more) to find specific sequences.

### How can I share sequences found in OEIS Client?

You can easily share a link to any sequence you find within OEIS Client by tapping the Share button. This allows you to send the sequence information to others via various communication channels.

### What devices does OEIS Client support?

OEIS Client is designed for Apple devices and supports iPhone, iPad, and iPod Touch. It was last updated to version 4.0.0 on June 1, 2019.

### Is OEIS Client affiliated with the OEIS Foundation?

Neither the app nor its developer are officially affiliated with the Online Encyclopedia of Integers (OEIS) or The OEIS Foundation Inc. All data is retrieved from the official OEIS website.

### What is the age rating for OEIS Client?

OEIS Client has an age rating of 4+, making it suitable for a wide range of users. The app's content is generally considered safe and educational.

### How often is OEIS Client updated?

The latest version of OEIS Client, 4.0.0, was released on June 1, 2019. While it has not received recent updates, the core functionality for accessing OEIS data remains stable.

## Version history (last 5 releases)

### 4.0.0 — 2019-06-01

OEIS Client is now native, but should be familiar to long-time users!

- Under the More section of a sequence's page, you can find links to various pages like list, graph, history, and more, just like on the website.
- Text now resizes according to your device's accessibility settings.
- Reordered the sections of a sequence's page to reflect their order on OEIS.org.
- Renamed the Settings tab to Help.
- Included a Privacy section in Help.

### 3.0.1 — 2017-11-19

Version 3.0.1 is a major update!

The jump in the version number is to reflect the numerous behind the scenes improvements, some of which have lead to very useful features such as:
  - Now when you see a sequence mentioned by ID, you can tap on it to view that sequence's entry. Finally!
  - Reduced the app size by half, which should make the app run faster.

Minor features and fixes:
  - Fixed a bug where a very long program would be cut off on the right.
  - The search tab has a magnifying glass icon instead of a home icon.
  - The tips shown on the search page when you start the app have been copied to the settings page so you can reference them whenever you need to.
  - Fixed a typo in the Bugs section.

I also forgot to mention in the last update that when you are viewing a sequence, you can grab a link to it by tapping or long-pressing the link icon at the top of the screen.  It's great for sharing and saving sequences.

### 2.0.3 — 2017-10-06

Version 2.0.3 is a major update!
- The app has a new look - let me know if you like it!  It uses a new UI framework that should be more stable and allow for more features to be added in the future.
- The app size has been reduced by about 80%, so it should take up much less space on your devices and install from the App Store quicker.
- Added full support for split screen on the iPad (available on iOS 9, 10, 11 on supported iPads).
- Tap on authors' names to see their user page on the OEIS wiki.
- Resize the text in the settings tab.
- Added a new section in the settings tab to report bugs and get support.
- Adjusted the app's 17+ rating since the app does not allow unrestricted access to the web any more.

### 1.0.3 — 2017-07-04

Added an About section in the help page.
Bug fixes.

### 1.0.1 — 2017-06-30

No release notes.

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## More apps by Muhammad-Sharif Moustafa

- [Blockquote Markdown Editor](https://appshunter.io/ios/app/blockquote-markdown-editor/id1396620426)

All apps by Muhammad-Sharif Moustafa: https://appshunter.io/developer/887309900

## Related topics

[oeis client](https://appshunter.io/ios/topics/oeis-client)

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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 2026-06-01.*