Need some advice on Apple (AAPL - Get Report) before we get the earnings report Tuesday night?

Jim Cramer's got your back.

On Monday, July 22, we got dueling notes from Morgan Stanley's Katy Huberty and Bernstein's Toni Sacconghi about Real Money Stock of the Day Apple's quarter.

And the day of reckoning is finally here.

In case you missed it, Huberty came out as bullish, raising Apple's price target to $247 from $231.

She wrote, "we believe the June quarter will mark the first quarter since March 2018 where Services revenue growth accelerates..."

Meanwhile, Sacconaghi wrote that Bernstein's expectations for Apple's Services revenue actually fall slightly below the Street's expectations.

So, here's Cramer's advice. 

"Those who want to trade it must know the service revenue number," said Cramer.

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