My daughter is almost 4 months ( 1week from today) now i mostly let her eat and sleep on demand but is this?

I think it sounds a lot like our basic routine - eating about every 4 hours, playing, napping every 2-3 hours. I will be impressed if you can get her to nap for the lengths indicated regularly, though maybe that is what she already does normally. At this age I would count on the 3rd nap as usually happening. I will also be impressed if you can get her to wake up at !0:30 for a bottle, because at that age DD would not wake from night sleep unless _she_ wanted to, but again, maybe your daughter is better at that. But yes, I think it sounds like a good guide to follow for that age.