I did an internship for a mobile games studio. They had really detailed estimates of competitor revenues because they were able to combine:

1) their own daily revenue from titles

2) publicly listed studios' quarterly revenue figures

3) the daily rankings of 1 and 2 in the two app stores

to extrapolate every rivals' revenue.

I'm pretty sure tinder grosses more than $1 m / day (excluding ads)

https://www.appannie.com/en/apps/ios/top/

https://thinkgaming.com/app-sales-data/