This looks exactly like https://algodaily.com minus the IDE and ability to actually code.
Also, heads up, under "Spaced Repetition":
"The best way to learn is to continually riview content. If you want to master coding interviews keep practicing. Getting an email in your inbox will make it easier to remember and will guide you."
Got a typo at "review". This also doesn't seem like spaced repetition-- there's no mention of any spacing/order. Going to build that in?
https://penzu.com/ https://280daily.com/ https://standardnotes.org/