Budget questions

I downloaded the app today and I am a little confused, please help! If I zero out my budget am I still going to lose weight ? Or do I need to be under budget to lose weight? Please help explain this to me 😅😅 does this mean I can eat 705 more calories and still lose ?

I downloaded the app today and I am a little confused, please help! If I zero out my budget am I still going to lose weight ? Or do I need to be under budget to lose weight? Please help explain this to me 😅😅 does this mean I can eat 705 more calories and still lose ?