MyStory.today is using a monthly subscription model. The subscription is optional and can be activated within the App from the Google Play Store or Apple App Store. A subscription from the web page is not possible yet.
If you're using MyStory.today on Android together with the Google play store, please have a look athttps://support.google.com/googleplay/answer/7018481?co=GENIE.Platform=Android
If you've got an iPhone or iPad together with the App store, please readhttps://support.apple.com/en-us/HT204939