How much do you tip on food delivery apps?

Just wondering what’s a good tip. I try to tip at least $1 if I’m really low on money but if I’m good on money I tip around $4-$5. Just wondering how much other people tip when it comes to using Doordash, Uber Eats etc. because I’m not sure if I’m tipping enough. Or what’s your reasoning for not tipping at all?

Edit : I don’t drive at all so that’s why I don’t get the food myself . I wish I could tip more but sometimes it’s my only way to get food .