@coraimasweet1204, that I'm not sure about. We have only had baby trend infant seats but the tray clicks down and that's how it snaps to the stroller. You could probably Google to see if any seat fits into it.
I love my baby trend sit n stand. I have the model were both front and back have a sun shade. It's not heavy and easily closes. It's also easy to take the back part off for when your older child wants to use the stand feature.
@coraimasweet1204, that I'm not sure about. We have only had baby trend infant seats but the tray clicks down and that's how it snaps to the stroller. You could probably Google to see if any seat fits into it.