Besides accessing your evon Smart Home system with the official app, you can also connect to it with any modern browser (e.g. Chrome, Safari, Edge). You only have to know the IP-Adress (Which is displayed in the app once your system is found).
When you enter the address in the url bar of your browser, you will be directed to the login page, where you will have to enter your credentials. You can then use your evon Smart Home system like you are used to.
If you connect to your evon Smart Home system with a browser (e.g. Chrome), some device specific functions from the mobile App may not be available to you. These include, among others, native notifications, which also appear when the app is currently not in use.