When I download apps with my Hong Kong ID, I rarely get prompted to upgrade. But when I download apps with my mainland ID, I get prompted to upgrade every now and then.

A Hong Kong compatriot who has been working and living in Guangzhou for many years asked me a question. He said that he has two iPhones, one ID is registered in Hong Kong, and the other ID is registered in the mainland. He has downloaded hundreds of apps on both phones, which are basically a mixture of domestic apps and foreign apps. But what puzzled him was that the same domestic apps downloaded with a Hong Kong ID rarely prompted to upgrade, but the same domestic apps downloaded with a mainland ID would prompt to upgrade every now and then.

This is what puzzled him the most, and it also raised a soul-searching question: Do mainland APPs like to upgrade so much? Is there a problem with the design of mainland APPs? At first, I was also skeptical about this. But then I found another iPhone, and then used the Hong Kong ID I got from "Taobao" to download the same domestic APP, and found that it was really like this: the domestic APP downloaded with the mainland ID always prompted to upgrade every now and then, but the domestic APP downloaded with the Hong Kong ID did not have this problem.

I used to think it was nothing when I upgraded the app, but now that I have a comparison, I feel something is wrong. What do you think is the reason? I am puzzled.