Pico Compiler is the first offline Java 9 compiler available in the App Store!

Pico Compiler is a lightweight development environment for writing Java programs.

Key features:

• Java 9 offline compiler

• Developer keyboard - Developer keyboard adds a new row of keys to the default on-screen keyboard. It consists of swipe buttons with all common symbols, punctuation and brackets, and a special navigation key.

• Smart code completion - Pico will complete the names of classes, methods, fields, and keywords within the visibility scope. When you invoke code completion, Pico Compiler analyses the context and suggests the choices that are reachable from the current position of the caret.

• Black UI theme - protect your eyes with the dark theme.

The app is designed as an educational tool and cannot be used to develop complex projects (Spring, Hibernate, Java EE etc). Visit project website at to learn all Pico features and limitations.

Java is registered trademark of Oracle and/or its affiliates.
The Pico Compiler project is not affiliated with Oracle.

What’s New

Version 2.0.7

• Fixed ArrayList error
• Bug fixing

Ratings and Reviews

3.3 out of 5
298 Ratings

298 Ratings

AppyiTunes ,

Good Potential, but still missing adding java files

Re-downloaded it and bought the 2.99 pro version. You can make things from scratch -which is a good for practice. But there is a missing feature to add and remove files, to transfer files to computer.

DarkRadon ,

Nice for some experimental coding

Very nice app for experimenting and exploring ideas while away from the PC; very useful for when I am waiting in line somewhere, and an idea pops into my head. The free version is just to give you an idea of how it works, and the price if the pro version is good considering what one can do with this app. Highly recommended!

smrxx ,

Works but I can't see variable names

I wrote a simple program with for loop printing numbers but I couldn’t see the loop index. I’ll try to repeat it here:

for (int thisIsMyForLoopsForLoopIndexVariableButWithShortVariableName_HeyThisIsJavaAfterall;

See, I had to give up at first semicolon due to screen being too narrow for even the shortest of Java variant names.

App Privacy

The developer, Marcin Olawski, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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