I am trying to log into my iCloud account from my iPhone or iPad but it only offers to set up iCloud on my device or let me use Find My iPhone or Find My Friends. How can I actually log into my account?
iCloud.com behaves this way because you should, theoretically, be able to do everything you need to elsewhere on your device. If you find yourself in a situation where you need to get into your iCloud account through the web, you can still do it by tapping the share button and tapping "Request Desktop Site." This will get you there but it won't be pretty as it isn't optimized for mobile.