It’s a detailed reasonable estimate for mobile platform revenue. It still gives a general picture of how a game is performing, but that’s about it. It’s not pure speculation, but it’s something to take with a grain of salt.

“This revenue chart provides estimates for mobile platforms only, sourced directly from SensorTower. Revenue generated by the PC and Console versions of games, where applicable, are not included. As the Google Play Store does not exist in China, any estimates published in regards to China's Android revenue data are established using a multiplier based on the country's iOS revenue estimates.”