Smartphone OS market share - Kantar Worldpanel data →

On one hand, its useful to know how market share is changing for the different smartphone operating systems.

On the other though, its hard to draw any sort of meaning out of change in market share without knowing what the change in the market size is. I know that there are more smartphones than 12 months ago, and that Apple's share has declined. But does that mean that Apple is selling more phones? Or the same amount of phones in a growing market?