No. When you can't get to your phone to record a nap, bottle or nursing entry on time, select the button on the main screen for the activity you wish to record. Select the + button in the upper right of the screen, then enter the start and end times manually by selecting the date and time buttons.

If you don't start a timer when an activity starts but still wish to use the timer, you can! Just start the timer as you normally would, then adjust the start time on the timer screen by selecting the time button.