The DU Lounge

On my phone and tablets. Here's the Wikipedia definition:

Township is a casual farming and city-building game developed and launched on multiple platforms by Playrix in which players develop starter towns by building factories, harvesting crops, and creating goods. The main goal of the game is to link one independent agriculture operation into a complete set of industrial chains, increase income, expand the territory, and make your town more prosperous by increasing the population.

I've been playing it, pretty much every day, for over seven years. It's free but there is the temptation to buy Township cash (in-game currency) to (continuously) play the game within the game, a match-3. In 2020, the number of daily users went over 3.5 million.