In case you missed the news, Nintendo makes mobile apps now. We saw the company's first Android app, Miitomo, come stateside at the end of March. A month later, that game had attracted over 10 million users around the world. Miitomo is more of a social network than a playable experience, but it does contain mini-games. The app has made Nintendo more money than expected.

Two "pure-game apps" are coming next, based on Animal Crossing and Fire Emblem. And as the chief executive of DeNA (Nintendo's mobile development partner) told The Wall Street Journal, “Fire Emblem and Animal Crossing are both free-to-start apps.”

During its earning call last night, Nintendo announced that Miitomo has had 10 million users since its release in March, with 20 million 'Miifotos' created and 300 million conversations started. To celebrate reaching the 10 million mark, the company has announced a 10-day promotional period, lasting from April 29 till May 8. There's no word on what this will involve, but I wouldn't be surprised if users can win exclusive, limited-edition clothes for their Mii, or something of that ilk.

The Japanese game company also announced two new mobile games to build on the success of Miitomo. One game is based on the Fire Emblem series, while the other is based on Animal Crossing.