Don't panic!
This app works from its website, but a downloaded copy cannot start by itself. Visit oq.spacepope.dk to install it.
Install it as an app
Open the OQ! website in your browser, then open the browser menu and choose Install app or Add to Home Screen. Follow the prompt, and OQ! will get its own icon and work like an app.
On iPhone or iPad, use the browser’s Share button and choose Add to Home Screen. On a computer, look for the install icon in the address bar or browser menu.