By collect we’re talking about sending information to any system or device other than the device itself. No personally identifiable information is collected. The unique Android device ID is sent to differentiate one device’s usage from another.
Free: Anonymous usage information is collected to help improve the app and fix issues more quickly. The data is only sent when connected to a WiFi network, therefore doesn’t use the device’s cell data. There is an option within the app’s Settings to opt out of this service.
Pro: No usage data is collected.