In a no-cost math game, kids start by creating an account with a username and password. They'll need to provide a parent's email address to get the account set up. After selecting a grade level and naming an avatar, users meet a friendly creature who guides them as they enter a fantasy world filled with battles and rewards.

My son came to me looking to get this game called bitlife - life simulator, at first I thought wow this must be a really explicit game. But I downloaded it on my own device and it turned out to be perfectly harmless.