P Cheng (PC)
Updated in Nov 2021: Have been using iphone for years and recently switched back to Andriod 11 mobile. This app still works, surprise! Updated in Dec 2013: Logging was stopped after upgrading to kitkat 4.4.2. Kindly please rectify the problem.
This problem is determined to be a bug in the OS. There is a need to wait for the correction of contact on Google. sorry.