Whatsapp Function


Good Morning

I have recently started to use whatsapp and I regularly communicate with one particular person. My phone hibernates automatically after 30 seconds. If I have woken up my phone in the night without checking for whatsapp messages when I wake it up in the morning this person says 'I see you were awake in the night'. Does whatsapp allow this person to able to see when my phone is activated

Thanks for any replies.