Am I wrong in thinking that checkboxes/tickboxes/whatever-one-calls-them are ubiquitously understandable across cultures from both an interpretation and interaction perspective? If so, it wouldn’t be the first time I’ve made this assumption/mistake so I’d be happy to hear about it!

If not (and I am right in thinking these are globally understood), then there’s a clear advantage of the checkbox over the switch in that it doesn’t depend on any color recognition to convey the current state. This is a huge win - I have definitely encountered UI controls where the current state was not at all apparent.

I happen to use an iPhone, and haven’t personally had any issues interpreting the “switch” state nor the checkbox, but what if you’re color blind or from a culture where the color doesn’t necessarily mean what you think it does?

Edit: clarify intent