The page provides the default installation paths which we use for various installation methods.

If you installed Focus using one of the packages for macOS, you will find Focus installed in: /Applications/focus

If you installed Focus using one of the packages for Linux(deb, rpm), you will find Focus installed in: /opt/focus

If you installed Focus using source code and just parameter while compiling using ./build_all, you will find focus on your home directory: ~/focus