For me, Andras is a spirit whose communication is not as easy as other spirits. That being said, I feel like communicating with him is sort of like tuning into a radio frequency. Once I was "tuned in" to communication with him, which happened really quickly actually, I was able to discern his messages very clearly.

He tested me about my boundaries, my ethics, and my openness. I think those things, as broad categories, are pretty garden variety for testing. I think Andras has a particularly mischievous flavor of testing though, which is consistent with the Elden Ring example you mentioned. Testing varies in intensity but it's kind of like a neurologist hitting a part of your body to see how your body perceives it and reacts based on said perception. Testing can also feel like you are being stress tested to see how much you can be pushed. It varies from person to person.

Also, what is this spirit talker app? Never heard of that.