# CS++ Java IDE — Code Java on iPhone & iPad

> Offline Java IDE for learning and AP Computer Science A practice on iOS. (iPhone/iPad app by Kevin Hare.)

- Source: https://appshunter.io/ios/app/cs-plus-plus-java-ide/id6763799792 (this page in markdown: same URL + `.md`)
- Developer: [Kevin Hare](https://appshunter.io/developer/1343264116)
- Category: Education, Developer Tools
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 30 MB
- Languages: American English
- Released: 2026-04-28
- Data updated: 2026-08-10
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/cs-plus-plus-java-ide/id6763799792/reviews.md

## What is CS++ Java IDE?

CS++ Java IDE is a focused, offline Java environment for students learning to code — and a complete AP Computer Science A practice platform.

Write code in a real Java IDE designed for touch. Run programs instantly with the bundled Java runtime — no internet, no compiler setup, no accounts. Tap Run and your code executes on your device.

WHAT'S INCLUDED
• Multi-file Java editor with syntax highlighting, line numbers, auto-indent, and a templates menu
• Bundled Java runtime — runs your code locally, even on airplane mode
• Unit 1 free: 11 hand-picked starter problems covering primitive types, output, and your first algorithm
• Full AP CSA course (one-time $9.99 unlock): 11 units, 50+ inline coding challenges, persistent progress
• Pseudocode-to-Java translator for AP CSP students stepping up
• System.out.println, Scanner input, exceptions, ArrayLists, classes, inheritance — every topic in the AP CSA Java subset

DESIGNED FOR LEARNING
• Each challenge tests your output against expected results
• Inline error messages with the exact line and what went wrong
• "Format" button cleans up indentation in one tap
• Templates dropdown loads common patterns: Scanner input, file reading, ArrayList traversal, recursion
• Progress saved on-device — pick up where you left off

UNIVERSAL
Built for iPhone and iPad. The editor and console scale from 4-inch phones to 13-inch iPads, with a full-bleed editor on phones to maximize coding space.

OFFLINE-FIRST
No account creation. No login. No data sent off your device. Lessons, code, and progress all live in the app's local storage. Use it on a flight, in a classroom with no Wi-Fi, or anywhere.

THE FULL AP CSA COURSE
Unlock all 11 units for $9.99 (one-time, no subscription):
1. Primitive Types & Output
2. Booleans & Conditionals
3. Iteration
4. Strings
5. Arrays
6. 2D Arrays
7. ArrayList
8. Recursion
9. Classes & Objects
10. Inheritance & Polymorphism
11. Searching & Sorting

Built by Yellow Dart Publishing for csplusplus.com — the College Board–aligned CS curriculum used by teachers across the U.S.

## Key features

- Offline Java IDE
- Syntax highlighting
- Bundled Java runtime
- AP CSA curriculum
- Progress tracking
- Multi-file editor

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Full Course Unlock | $9.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/cs-plus-plus-java-ide/id6763799792/reviews.md

### 5/5 — Best coding app

*2026-04-30*

Through this I learned how to code and do Java

## Frequently asked questions about CS++ Java IDE

### What is CS++ Java IDE?

CS++ Java IDE is a mobile application designed to help users learn and practice Java programming. It functions as a complete Java Integrated Development Environment (IDE) that runs directly on your iPhone or iPad, offering offline capabilities.

### How does CS++ Java IDE help with learning Java?

The app provides a real Java IDE experience with features like syntax highlighting, auto-indentation, and a templates menu. It includes starter problems and a full AP Computer Science A curriculum, with challenges that test your code against expected results and provide inline error messages.

### Can I use CS++ Java IDE offline?

Yes, CS++ Java IDE is designed with an offline-first approach. It includes a bundled Java runtime that executes your code locally on your device, meaning you don't need an internet connection to write, run, or practice your Java programs.

### What content is included in the AP CSA course unlock?

Unlocking the full AP CSA course for a one-time $9.99 fee provides access to all 11 units, covering topics from primitive types and conditionals to classes, inheritance, and sorting algorithms. It includes over 50 inline coding challenges with persistent progress saving.

### What devices is CS++ Java IDE available on?

CS++ Java IDE is a universal app built for iPhone and iPad. The interface scales to fit various screen sizes, from 4-inch phones to 13-inch iPads, maximizing coding space.

### How often is CS++ Java IDE updated?

The latest version of CS++ Java IDE is 1.1, which was last updated on July 24, 2026. Updates typically include bug fixes, performance improvements, and potentially new content or features based on user feedback and curriculum changes.

### What is the pricing for CS++ Java IDE?

The base application is free to download and use, offering Unit 1 of the AP CSA curriculum. The full AP CSA course, encompassing all 11 units and over 50 coding challenges, can be unlocked with a one-time in-app purchase of $9.99.

### Does CS++ Java IDE have ads?

No, CS++ Java IDE does not contain advertisements. The app is free to download and offers optional in-app purchases for full course content, ensuring an ad-free learning experience.

## Version history (last 3 releases)

### 1.1.1 — 2026-08-06

Full-screen fixes for iPhone.

• The toolbar no longer slides under the clock and Dynamic Island when you enter full screen in portrait
• The toolbar buttons now fit on a single row, so more of the screen is your code
• Full screen also respects the home indicator and the rounded corners in landscape

### 1.1 — 2026-07-24

True 64-bit long arithmetic — long values now behave exactly like Java's, all the way to Long.MAX_VALUE.

• New built-in classes: Long, Float, Short, and Byte
• Updated Java language reference
• Refreshed lessons and editor improvements

### 1.0 — 2026-04-29

No release notes.

## More apps by Kevin Hare

- [CS++ AP CSA](https://appshunter.io/ios/app/cs-plus-plus-ap-csa/id6763950108)
- [CS++ AP CSP](https://appshunter.io/ios/app/cs-plus-plus-ap-csp/id6763950898)
- [Debugging: Inside the Machine](https://appshunter.io/ios/app/debugging-inside-the-machine/id6764385144)
- [CS++ HCI Design](https://appshunter.io/ios/app/cs-plus-plus-hci-design/id6794191854)
- [CS++ Web Design](https://appshunter.io/ios/app/cs-plus-plus-web-design/id6794192705)

All apps by Kevin Hare: https://appshunter.io/developer/1343264116

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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 2026-08-10.*