After completing test sessions, the web version does not show the exact time of completed sessions. Thus, in paid test sessions, if a tester was forced to interrupt the test session and begin the next test session, then he does not know whether his total time in test sessions meets the threshold for payment.
Some time periods are shown precisely, such as 31 minutes. Obviously rounding applies to some time periods.
Two screenshots of the same test cycle, in the testNow application and the web version.