According to information recently released by Sensor Tower, a service that tracks data about app sales, Dragon Ball Z: Dokkan Battle has not only just surpassed $2 billion in all-time revenue, but has done so in only just over four years. This marks the shortest amount of time an app has been available before reaching that milestone.
The number two record holder for shortest amount of time to hit $2 billion in revenue is Candy Crush Soda Saga. Whereas Candy Crush was released in 2014 and took just over five years to hit the $2 billion milestone, Dragon Ball Z: Dokkan Battle was released about a year later, in April 2015, meaning it did the same thing in just about a year's time less than its closest competitor.
Quite possibly the biggest contributor to the rapid success of Dokkan Battle is its users tend to spend quite a lot of money on in-game microtransactions. The highest-paying subset of Candy Crush Soda Saga is iPad owners, who average spending $17.31 per user. Meanwhile iPhone users average $9.37, and Android owners, who are 76% of those playing the game, $3.24 per user. By contrast, Dragon Ball Z: Dokkan Battle players across both Apple and Android devices average spending around $35 per user.
Not only do Dokkan Battle users like to spend money, but they have done so far more rapidly within the past year. The game reached its first billion dollars in revenue in April 2018, which means that the second billion was amassed in only the 19 months that have followed. In total, the year of 2018 saw the game bring in $620 million in revenue. So far, 2019 has followed a similar trajectory, with $566 million earned. While the game's popularity doesn't seem to have surged since last year, it isn't declining by any means.
This success would seem to indicate two things: people really want games that allow you to play as not just Goku, but as the rest of the Dragon Ball franchise's deep cast of powerful fighters; and that games that rely on gacha mechanics are here to stay. Gacha games wouldn't rank too high on a hypothetical scale ranking the ethics of various kinds of microtransactions, but for better or for worse, there's still something uniquely satisfying about a roll of dice that nets you a rare fighter from a beloved TV show that seems to have caught on in a major way.