You can access audiokoobs without being connected to the internet:
Select the different koobs you want to listen to, click on them and then on the "Download" button.
The koobs should be saved on your device.
Please note: If you activated the feature to delete audiokoobs in your settings, the koobs you have saved will be deleted from your device after you have listened to them. To keep them on your device even after the first playback, you must disable this feature.