Spirit Airlines Infant Travel

Anybody have any experience flying Spirit with an infant? I can’t seem to find on their website what is allowed free of charge. I’m assuming I’m allowed a car seat, stroller, and diaper bag but just curious if anybody can give confirmation about that!

Trying to keep this trip at $0 if possible 😂 my parents are paying for the flight & I’m not even bringing a carry on (just free personal item-backpack) so if she gets her own personal item like a diaper bag that would be WONDERFUL.. don’t think I can fit my stuff AND her stuff for a 10 day trip in my backpack haha.

Thanks in advance!