Is a smartphone app(Non premium or subscribed service like Netflix) a public good?
Am I correct to say that the app is non-excludable?
I am sorry to say but this is wrong. Just assume google removes the application from the store. All android users would be excluded. There are many ways to exclude people from consuming an application. Access can be bound to a minimum age requirement, to a certain country (geo-blocking) or simply to a payment.
The possibility is important not the concrete situation.
Just because it is free now does not imply it is generally non-excludable.
Let’s ask the same question for a classic public good: Could you easily exclude someone from consuming air? Even if you wanted to this would be (nearly) impossible.