Question about Infor LN 10.5 (WorkTop and LNStudio)

Hi experts,

I have the follow questions about InforLN 10.5:
- Is it possible to login inforLN 10.5 with Worktop ?
- Is it possible to develop customizations wthout LN Studio?. If this question is true, Do we have any problem later if taking this option?

Regards,