What integrations with internal systems, websites, online stores are usually required?

Question

Mobile development

Colleagues, hello everyone.
A fairly general question, but I would like to know with which systems do you most often integrate customer / company systems, what did you encounter during the development process?
For example: connect an IM to 1C, or send SMS notifications, or connect a crm system with some external ...

Answer 1

I'm afraid that this is a VERY common question)) Here, as for me, the only matching criterion for most clients is sending SMS.
The rest ... who cares ... who doesn’t need anything ...
There are a lot of factors and conditions in order to somehow generalize ...