Apple (AAPL - Get Report) is coming for Yahoo Finance. Or, at least that's what Jim Cramer thinks. 

Cramer thinks that Apple's push into finance should be worrisome for Yahoo Finance, which has already attempted to build out its platform by poaching reporters from other financial platforms. 

Cramer's thoughts on Apple are based on a note from Bernstein's Toni Sacconaghi, who took a deep dive into Apple's advertising business.

"We now believe that Apple's advertising business is rapidly approaching an inflection point, and could generate several billion dollars in revenues in the near to medium terms," wrote Sacconaghi.