Yes. MindRazr is a digital streaming platform and therefore needs access to the internet, either via WiFi or mobile data network, to be able to stream the guided exercises needed to create sessions. Although you may be using music that is available offline that is already on your device, you won’t be able to use it in one of the MIME sessions until you have internet access. Similarly, if you have an intermittent or slow internet connection, you may find that the App loads content from the MindRazr platform slowly also. This is the same with any streaming platform and you will find the exercises load quickly when you are back in a good connection area once again.