I forgot to activate the sleep mode, can I add my sleep data manually ? August 11, 2015 11:57 Updated Yes, you can add your sleep data manually : Launch ZeFit2 Application. Tap on the violet area Click on "Add sleep" Related articles How do I activate sleep mode? I noticed some data discrepancy between my App and my ZeFit2, what can I do ? ZeFit How can I upgrade my ZeFit³ HR with the latest firmware available ? It seems the number of steps I have done is inaccurate.