After adding a single test-entry and pressing the Now button, I 'closed' WL using the Back button (Samsung Tab2 10.1, Android 4.4.2), and went for supper. After returning a bit later it had forgotten the time I pressed the Now button, though I'm very sure it was there when I closed it.
I have been unable to reproduce this behavior
but I'll keep an eye on it.
I did add another entry, and it kept the Now setting, when I last checked, even after a forced close of the app.
This is looking just like any professional Android app, kudo's