If i just need a visual development platform for simple apps, would this be suitable if i do not know java?
The question was answered here: https://www.cuba-platform.com/discuss/t/learning-cuba-platform-and-prerequisites
well it heavily depends on what you mean by “simple”. Generally i think one can create fairly big applications without touching any Java code. Nevertheless, as in any other environment, when you have requirements that you some if this then that should im implemented, you have to do it in Java.
You can just give it a try and have a look how long it takes to create a app like you think of.
For more information you can look at the above mentioned topic.