If you just want to kill five minutes on the train, Solitaired is my go-to. You...

https://www.primary-bookmarks.win/if-you-need-a-quick-brain-break-without-the-annoying-sign-up-screens

If you just want to kill five minutes on the train, Solitaired is my go-to. You don't have to deal with annoying logins or endless sign-up popups. It’s perfect for mobile because the hints are actually helpful when you get stuck