Pokemon Go is fairly low data usage, 10-20 MB per hour of play (which this document lists) is nothing compared to the hundreds of megabytes you can blow in 10-20 minutes streaming video.
Few other apps go out of their way to make similar warnings, instead they rely on the OS to do this for you, Android at least allows you to set both a warning and a stop point for your data consumption very easily. Many mobile providers prevent surprises to their customers by sending a text at 50%, 75%, 90% and then stopping unless they reply at 100%.
Few other apps go out of their way to make similar warnings, instead they rely on the OS to do this for you, Android at least allows you to set both a warning and a stop point for your data consumption very easily. Many mobile providers prevent surprises to their customers by sending a text at 50%, 75%, 90% and then stopping unless they reply at 100%.