New data from app store intelligence site Sensor Tower has revealed that Nintendo's library of smartphone titles have now generated more than $1 billion in player spending.

The figure combines totals from six games - Fire Emblem Heroes, Animal Crossing: Pocket Camp, Dragalia Lost, Mario Kart Tour, Super Mario Run, and Dr. Mario World - which incidentally have amassed a mighty 452 million downloads between them worldwide.

The majority of this income - $656 million, or 61% of the grand total - is from Fire Emblem Heroes alone, comfortably making it the highest-grossing of Nintendo's mobile efforts so far. You can see how the others stack up in the chart below:

Image: Sensor Tower

According to Sensor Tower, 54% of the $1 billion total was generated in Nintendo's home country of Japan (so that's $581 million); the US has the second-highest player-spending total with 29% ($316 million). In fact, only Mario Kart Tour and Super Mario Run have bucked this trend by generating more money in the US than Japan; all other games have performed better in the latter.

So, the next time someone asks you why Nintendo makes games on smartphones these days, you know where to point them. Impressive stuff.