Mobile Companion App


A free mobile companion app is available to users of the SAT Operating System. It allows you to quickly access to helpful information and support options relevant to the SAT Operating System while studying for the SAT test. Using the mobile companion app means you never have to interrupt your study session to go use a desktop or laptop computer to get access to the information and resources you need.

The app allows you to:

  • Download the trial or full version of the SAT Operating System
  • Access instruction manuals
  • View all of the video tutorials
  • View support information



The companion app is available for mobile devices running the Android operating system and is available from both the Google Play and Amazon App stores.

Download from the Google Play store Download from the Amazon App Store


The companion app is currently not available for devices running the iOS operating system.


  • Use the tabs along the top to access each feature in the app.
  • You can also press the “menu” button to quickly access key features including: the Learning menu, Video Tutorials, Instruction Manuals, Apps, Calc-Tech Support, and Share.

Specific features

Learn Tab

  • Instruction manuals. Access the manuals for both the TI-83+ and TI-84+ version of the SAT Operating System as well as the TI-89 and TI-89 Titanium version. The app saves your place in each manual so you can quickly get back to where you were last reading.
  • YouTube tutorials. Access all of the video tutorials on how to use the software to solve real SAT math problems.
  • Questions and Answers. Access all relevant FAQ information.
  • Wiki. Visit Calc-Tech’s wiki for the SAT Operating System.
  • Social Media. Visit our social media properties.
  • Contact Support. Contact Calc-Tech by opening a support ticket, chatting with us live via our Zopim chat client or by Skype, or by calling us directly. You can also access our support information website here.

Apps Tab

  • This tab allows you to download the SAT Operating System app for your graphing calculator.
  • It also allows you to download the instruction manual and screenshots for your specific version of the software.


  • This app only uses permissions related to network and storage card access.


If you have any questions or would like to provide us with feedback on this app or the SAT Operating System for your TI-83+, TI-83+ Silver Edition, TI-84+, TI-84+ Silver Edition, TI-89, or TI-89 Titanium graphing calculator, please feel free to contact us at any time. We will respond within 1 business day (usually sooner).