Struggling with addiction

Hey there! So, I've been finding myself hitting a wall when trying to focus on work. Every time I pick up my phone, I can't resist opening YouTube or WhatsApp. Even though I use them for learning too, it's pretty hard to stay motivated if I'm using these apps just for fun stuff instead of work stuff. By the end of the day, I feel like all my motivation drains away and I don't even want to study anymore. Anyone got any tips?