Word Connect is a relaxing word puzzle. Each level gives you a small wheel of letters, and you swipe across them to spell out words and fill in the board. Find every word to clear the level and move on to the next, with the puzzles slowly getting trickier as you go.
It is quick to learn and easy to lose an hour to, and it plays just as well with a finger on a phone as with a mouse on a desktop. Free in your browser, with nothing to install.