It doesn't matter to me how many Android users there are globally when we're talking about short range file transfers. I'm not bluetoothing files to somebody in India.

The US's market share split is more like 55% Android and 45% iOS, so anything that doesn't support both platforms is going to fail half the time here.

Anything that excludes 11% of the market isn't universal at all though, which was the OP's original request.

Especially when that 11% is a particularly vocal and active part of the market.