Similar tool in SNAP like spatial modeler in ERDAS


I want to compare SNAP and ERDAS while working with Satelite images from Sentinel-2 and Landsat 8.
In ERDAS is a tool called spatial modeller. It is possible to do mathematical calculations and creat youre own functions (to calculate and compare different indices for example.).
I dont found anything online. Is it possible to build models for Sentinel 2 data in SNAP without being advanced in batch processing or comand line code writing? If not are there examples for doing that?

do you mean doing band math and things like that?

yes in a modell

hum…do you know you can use the SNAP API in Python with a specific module called snappy? I do not know if that can be useful for you…

Have you found the graph builder, the GDE, which is very easy to use?