US and Japan are the two unusual countries where iOS has more market share than Android. In the rest of the world, iOS is maybe 20%. For computers the situation is exacerbated by the fact that many people own one mostly for gaming, which means it's going to be Windows. Whereas an iPhone is considered a status symbol.

> In the rest of the world, iOS is maybe 20%

If you count the number of devices. By app store sales, the figure is maybe 50%, probably higher.

MacOS also isn’t connected to a cellular network.

And what difference does that make with regard to software distribution models? It can easily be connected to a cellular network using one of those USB modem sticks btw.

Being connected to a cellular network puts different responsibilities on the platform vendor due to the global reach of a software problem.

What "software problem" are you talking about?

I’m talking about the carrier network requiring protections. The carrier like to verify devices on their network. There was a time when booking up a fax was illegal. Apple is responsible for the activity of the devices they create on the carrier network.

> Apple is responsible for the activity of the devices they create on the carrier network.

Where did you get this idea? You are responsible for what your device does on the network. It's in your contract with your carrier. If you interfere with others' ability to use their phones on the same network, that has a good chance of the communications authority getting involved.

But we're talking about apps. The worst thing an app can do is DDoS something. That would just make you run out of data very quickly. Or auto-dial numbers (Android allows that, with a permission for which the app has to ask you), you'll just rack up an enormous bill and will learn to never make this mistake again. Or spam SMS, same thing.

Eveyone can interpret the various rules and regulations. I think you should do more research and reflection on how easy it is to be in cellular network.

The "being in cellular network" is done by the modem. It's a separate CPU core that doesn't run any user code. If you jailbreak the user OS, you can send AT commands to it, which is still harmless as far as RF interference is concerned.

But I really struggle to understand how any of this relates to the distribution of apps that run in sandboxes.

Are you implying that macOS has a smaller market share because of the lack of restrictions? Cause its competition, Windows, is less restricted if anything.