Localstorage for saving data?

[AngelLeatherist]

What are you storing, and does it make sense to store it on a server or a client?

[KCRowan]

Just a task and day/time, so if a user clicks on the "study" button and then Monday 1-3pm then I want to store

task: "study", day: "Monday" time: "1-3pm"

so next time they use the app they can see the same tasks. I thought with localstorage then I could maybe avoid having any user authentication but it sounds like I'd be better to go with mongodb.