# iCoder - Advanced Algorithms — Your Best Algorithm Teacher

> Algorithm and data structure learning tool with interview preparation and a large question bank. (iPhone/iPad app by 天从 何.)

- Source: https://appshunter.io/ios/app/icoder-advanced-algorithms/id1458259471 (this page in markdown: same URL + `.md`)
- Developer: [天从 何](https://appshunter.io/developer/914453386)
- Category: Education, Reference
- Price: $1.29 with in-app purchases
- Rating: 3.70/5 from 6 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.0 · 10 MB
- Languages: American English, Chinese (Traditional, Taiwan), Chinese (Simplified, China)
- Released: 2019-04-05
- Data updated: 2026-08-23
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/icoder-advanced-algorithms/id1458259471/reviews.md

## What is iCoder?

Eight years. One mission: help you master algorithms without distractions.

iCoder is a LeetCode practice app trusted since day one by learners preparing for technical interviews. Version 8.0 marks our 8th anniversary with a complete SwiftUI rebuild: faster, cleaner, and ready for iOS 16 and later. Still 1000+ classic problems, still offline, still no ad popups.

WHY iCODER

- Born for interview prep: company-tagged problems mirror what top firms often ask
- Organized by difficulty, tags, and companies so you can drill weak spots
- Offline-first: the library lives on your device; browse, quiz, and widgets work without Wi-Fi
- Eight years of polish: now with a modern SwiftUI interface and rich widgets

BROWSE AND SEARCH

- Numbered list or compact grid with adjustable columns on iPhone and iPad
- Filter by Easy, Medium, Hard, VIP, favorites, and learning status
- Optional Favorites and Recently Viewed at the top of the Problems tab
- Search by problem ID, title, content, tag, or company
- Swipe and context menus for favorites and status

CATEGORIES

- Algorithm tags from arrays to dynamic programming
- Company collections for targeted interview practice
- Smooth flow from filters to detail

PROBLEM DETAIL

- Bilingual Chinese and English descriptions
- Adjustable font size
- Unlearned, Learned, and Mastered tracking
- Toolbar favorites and solution links when online
- Share a long image for notes or study groups
- Previous and next problem navigation

DAILY QUIZ AND REVIEW

- Ten questions per day by difficulty, tag, or company
- Today score, best score, and streak
- Wrong Book with one-tap return to full problem detail
- Reshuffle for extra practice the same day

LEARNING TRACKING

- Favorites and Recently Viewed lists in Settings
- One-tap clear all recents
- Stats for favorites, learned rate, and mastered rate

WIDGETS (iOS 16 AND LATER)

- Daily Problem, Difficulty Glance, Daily Quiz, Favorites, Wrong Book, Learning Progress, Company Spotlight
- Lock Screen and StandBy compact layouts; deep-link into the app
- On iOS 17 and later: shuffle from Daily Problem and Company Spotlight Home Screen widgets without opening the app
- In-app Widget Guide with FAQ

PERSONALIZATION

- Sixteen accent colors; Light, Dark, or System
- Widget backgrounds can match your theme
- English, Simplified Chinese, Traditional Chinese, or Follow System
- List or grid layout with custom column count

SHORTCUTS

- Up to four Home Screen quick actions on long-press
- Deep links from widgets and shortcuts
- iPad and Mac keyboard shortcuts

SUPPORT

- Rate, email feedback, share the app, tip the developer
- More apps from the developer
- Optional App Store update reminder

OUR PROMISE SINCE YEAR ONE

- No ad popups inside the app
- Offline problem library
- Your time is precious; we respect it

Requires iOS 16.0 or later. Download iCoder 8.0 and celebrate eight years of practice with us.

## Key features

- 1000+ algorithm question bank
- IT company interview preparation
- Powerful search engine
- Shareable learning progress
- Cross-platform support (iOS, iPadOS, macOS)
- Keyboard shortcuts for navigation

## Pricing and in-app purchases

Base price: $1.29.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Tip the developer | $0.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/icoder-advanced-algorithms/id1458259471/reviews.md

### 5/5 — suggest adding a "discussion" section to allow users to view comments and feedback

*2024-11-19*

There's a minor UI bug where the header overlaps part of the text. I suggest adding a "discussion" section to allow users to view comments and feedback on articles without a solution.

**Developer response:** Hi maven_23, thank you for the thoughtful feedback — and sorry for the late reply!

Header overlap: This was a layout issue in the older version. In v8.0, we rebuilt the problem detail screen in SwiftUI: the header card and problem body are now stacked separately instead of overlapping, and the WebView background was adjusted so text no longer gets covered. Please update to the latest version and let us know if you still see any overlap.

Discussion section: We don’t have a dedicated in-app Discussion tab yet — that’s a great suggestion, especially for problems without official solutions. For now, you can open More (⋯) → View Solution → Problem (English/Chinese) to jump to the LeetCode problem page, where community discussion is available on the website. We’ve added this to our feature list for a future update.

Thanks again for helping us improve iCoder!

## Frequently asked questions about iCoder

### What is iCoder?

iCoder is an educational application designed to help IT advanced users learn algorithms and data structures. It provides a large question bank and interview preparation materials in a simple and comprehensive format.

### How many questions are in the iCoder question bank?

The iCoder application features a question bank with over 1000 questions to satisfy users' desire for algorithm knowledge and prepare them for interviews.

### Does iCoder have ads?

No, iCoder promises that advertising pop-ups will never be displayed in the app, guaranteeing concentration and an excellent learning experience.

### What platforms does iCoder support?

iCoder offers perfect support for iOS, iPadOS, and macOS devices, including iPhone and iPod. Users only need to pay once for access across all supported platforms.

### How does iCoder compare to other algorithm learning apps?

iCoder stands out by offering real interview questions from well-known companies and a rich question bank with comprehensive classification for targeted training. It also provides shortcut keys for efficient navigation on iPad and macOS.

### What is the price of iCoder?

iCoder is available for a one-time purchase of $0.99. This price grants access to the app on all supported platforms, with no additional charges for other devices after the initial purchase.

### How often is iCoder updated?

The latest version of iCoder is 7.0.0, last updated on April 15, 2026. This indicates a commitment to ongoing development and feature enhancements.

### Is iCoder suitable for beginners?

While iCoder is targeted at IT advanced users, its simple and comprehensive presentation of knowledge aims to make learning algorithms and data structures accessible to a wide audience, including those new to the concepts.

## Version history (last 5 releases)

### 8.1.0 — 2026-06-06

iCoder 8.0 - 8th Anniversary Edition

- Celebrating 8 years with a major SwiftUI rebuild for iOS 16 and later
- Thank you for years of support; version 8.0 is our anniversary gift to every learner
- App identity unified as iCoder across the Home Screen, About page, and the full app
- Redesigned About page with feature highlights and version info
- All-new in-app Widget Guide: setup steps, Lock Screen and StandBy tips, widget gallery, and FAQ
- Seven Home Screen and Lock Screen widgets: Daily Problem, Difficulty Glance, Daily Quiz, Favorites, Wrong Book, Learning Progress, and Company Spotlight
- On iOS 17 and later, shuffle another daily pick from the Daily Problem Home Screen widget without opening the app
- Daily 10-question quiz with streak tracking and a Wrong Book linked to full problem detail
- Browse 1000+ problems in list or grid; filter by difficulty, VIP, favorites, and learning status
- Categories by tags and companies; search by ID, title, content, tag, or company
- Problem detail: bilingual text, adjustable font size, share as a long image, toolbar favorites, solution links, prev/next navigation
- Per-problem Unlearned, Learned, and Mastered status; Favorites and Recently Viewed on the Problems tab
- One-tap clear for all Recently Viewed history
- Customize up to four Home Screen quick actions
- Widget backgrounds can follow your accent theme; widgets work fully offline
- Sixteen accent colors; Light, Dark, or System appearance
- UI language: English, Simplified Chinese, or Traditional Chinese
- Keyboard shortcuts on iPad and Mac
- Still zero ad popups: eight years of focused practice, unchanged

### 8.0.0 — 2026-06-02

iCoder 8.0 - 8th Anniversary Edition

- Celebrating 8 years with a major SwiftUI rebuild for iOS 16 and later
- Thank you for years of support; version 8.0 is our anniversary gift to every learner
- App identity unified as iCoder across the Home Screen, About page, and the full app
- Redesigned About page with feature highlights and version info
- All-new in-app Widget Guide: setup steps, Lock Screen and StandBy tips, widget gallery, and FAQ
- Seven Home Screen and Lock Screen widgets: Daily Problem, Difficulty Glance, Daily Quiz, Favorites, Wrong Book, Learning Progress, and Company Spotlight
- On iOS 17 and later, shuffle another daily pick from the Daily Problem Home Screen widget without opening the app
- Daily 10-question quiz with streak tracking and a Wrong Book linked to full problem detail
- Browse 1000+ problems in list or grid; filter by difficulty, VIP, favorites, and learning status
- Categories by tags and companies; search by ID, title, content, tag, or company
- Problem detail: bilingual text, adjustable font size, share as a long image, toolbar favorites, solution links, prev/next navigation
- Per-problem Unlearned, Learned, and Mastered status; Favorites and Recently Viewed on the Problems tab
- One-tap clear for all Recently Viewed history
- Customize up to four Home Screen quick actions
- Widget backgrounds can follow your accent theme; widgets work fully offline
- Sixteen accent colors; Light, Dark, or System appearance
- UI language: English, Simplified Chinese, or Traditional Chinese
- Keyboard shortcuts on iPad and Mac
- Still zero ad popups: eight years of focused practice, unchanged

### 7.0.0 — 2026-04-15

What’s New
* Improved layout on devices with notch or Dynamic Island for more accurate alignment of the tab strip and list.
* The list now extends behind the tab bar for smoother scrolling and a cleaner look.
* Question titles in the list are centered for easier reading.
* Fixed a crash that could occur when opening Search on some OS versions.
* On Mac (Catalyst), Search is available from the menu and via keyboard shortcuts.

### 6.0.0 — 2022-05-15

- Added Favorites feature
- Optimize some experience issues

### 5.6.0 — 2021-03-14

Fix some bug issues

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All apps by 天从 何: https://appshunter.io/developer/914453386

## Related topics

[icoder](https://appshunter.io/ios/topics/icoder)

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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 2026-08-23.*