Pou, one of the most popular apps on Google Play, with several million downloads, invites you to take care of a little alien in the shape of... well, poop. Your job is to pamper it in order to get it to grow, evolve, and be happy.

The concept of the game is very similar to the classic Tamagotchis that were super popular towards the beginning of the century. That is, you have to feed your pet, play with it so he has fun, clean it so it's healthy, and ultimately give it the attention it needs.

As you do so, Pou will grow and, most importantly, the app will reward you with different things such as hats, clothing, or backgrounds for your small pet. So, you always have incentives to keep taking care of Pou.

The best thing about Pou, however, is that it can communicate with other users of the app. That is, you can visit your online friends' Pous and receive other kinds of rewards.

Pou is an entertaining app that's super popular for one reason: it's incredibly addicting. You won't be able to stop taking care of your Pou once you start.