Purchase of the e-course enables you to install the app on  three different mobile devices , whether a  tablet or smartphone ,  iOS  or  Android (with access to Google services and apps) . When completing your 4 th installation, you will have to deactivate the e-course on one of the 3 devices you have previously used. For these devices, once the e-course has been installed and the full version downloaded, you will not need the internet to use it.
You can also install the e-course  on as many macOS or Windows PCs  as you wish, but only one device at a time can be used and you will need an internet connection.
Note: the app is not compatible with Chromebook !
The process must be repeated for each device used. There is therefore no synchronisation between different devices.
You must connect to each device with the same e-mail address , the one you selected to link with the licence when registering your product.
The e-course is therefore compatible with the following 4 environments: