Yes there is a way.
You can import your own elements in Studio. See:
You will have to create your own element code and import it in the studio.
There is an example Under GitHub in the page reference above.
Thanks for your reply !
I intend to link via I2C the NXP Rapid IoT to my IC and sensor, and I want to have the phone app and the could support. For this project, would you say that using MCUxpresso is better than the Rapid IoT Studio ?
It will depend on how you are used to develop and how complex it's your design, if you are just starting with the kit, I would recommend you to do it with the rapid IoT studio and if you find that the Rapid IoT studio it's not enough for your project needs, you can always export your current Rapid IoT studio project to the MCUXpreso IDE and finish it in that one.
Thanks for your email.
I understand that the design cannot be re exported into Design Studio once it is done with MCUXpresso, right ?
On another note, I was reading about getting the code for a new I2C IC to work with it in Design Studio, and it does not look simple at all.
If I write everything in MCUXpresso, is it possible to have the iphone app and cloud support as with Design Studio ?
You can find some examples in the community, could you please check this one ?
I believe that must be something that you can use as a base for your own applications.