The Speedtest app from Ookla has long been able to tell you how fast your internet connection is, but now it can tell you how fast individual apps are. The feature is called Speedtest Live, and it's available in the latest version of the Speedtest app. Be warned; there are some potential privacy concerns.
Speedtest Live is tucked away inside the tools menu of the Speedtest app. When enabled, it uses a VPN on your device to log the data usage by each app on your phone.Read More
The new Speedtest Live tool tracks data usage by individual apps was written by the awesome team at Android Police.