The Dr. Richard Feynman Observatory BASIC! for Android

About BASIC!

RFO BASIC! is a dialect of Dartmouth Basic that allows you to write and run programs directly on your Android device. In addition to the traditional Basic features, your have access to:

BASIC! programs may be packaged into applications. There are two processes provided for this.
One process generates a home screen shortcut but requires BASIC! installed to run.
The other process generates a stand alone application that does not need BASIC! installed. The resulting application can be offered on the Google Play Store.

All of the features of BASIC! are documented in the manual, De Re BASIC!, which is currently over 150 pages in size.

The install package include almost three dozen BASIC! source code files that explain and demonstrate the implementation details of this dialect.

BASIC! is being continuously improved. Many of the improvements have come from user requests. Join the BASIC! forum and become part of the development team.

This project was created as a labor of love by Paul Laughton, the curator of The Dr. Richard Feynman Observatory and author of Atari Basic and Apple DOS 3.1.

BASIC! is free to all, now, and forever. The underlying source code is available under the terms of the GNU General Public License.


The BASIC! user manual, De Re BASIC!, is available here on Bintray as a downloadable PDF document.


The release notes, manual, and Android .apk files for the last several versions can be found here on Bintray.


If you have questions, comments, enhancment requests or bug reports, the RFO BASIC! Form at is the place to go.

Source Code

BASIC! has been on GitHub since 2012. The source code for all versions since then is available at

Distribution License

BASIC! is distributed under the terms of the GNU General Public License, version 3.