Different battery status on coconutBattery app

As shown in the picture, the battery percentage on the upper right shown that the battery is 100% (fully charged) but coconutBattery app shows that it's only 95.6% charged.

I've tried to 'recalibrate' the battery by depleting it completely and then fully charged it without use but it still shown different status. It's not something that has become an issue nor a big deal but I still want to know why they show different percentage status.

Thank you in advance.