libreǝvent can be downloaded in two main ways, either by downloading the prebuilt zip / tar files or by downloading the entire GitHub repository and compiling it manually. We would highly suggest that you download the prebuilt version of libreǝvent to make things easier. After downloading, you can follow our guide here to get libreǝvent installed on your server.
Depending on your webhosting company, you might also need to download the "node-modules" to deploy libreevent. If so, the installation guide will tell you to do it.
You may download the iOS & Android apps from the AppStore / Google Play Store respectively.