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> I guess we'll have to agree to disagree on that.

Let's be clear about this: you are the seller, we are the customer. You can't `agree to disagree` with your customers.

If you don't agree to what some your customers are telling you, then they won't be your customers, and you won't lose just these customers but also all the others who observe your behavior. It is a modified case of repeated prisoner's dilemma. If I observe that you tend to defect on other instances, I will less inclination to cooperate. In other words, your reputation will suffer.

On the consistent user interfaces, the consistency of an app with other apps on the same platform is much more important than the consistency of that app across platforms. Even if you use multiple platforms, you switch much more frequently between apps on the same platform than between different instances of one app across platforms.