The Tottenham Hotspur head coach is said to use the instant messaging service to feed vital information through to his star man.
Kane is the first English golden boot winner since Kevin Phillips in 2000
His career has taken him from League One to the Championship, to being Tottenham Hotspur's top scorer and an England international. Now a Premier League golden boot winner, the rise of Harry Kane is almost gravity defying.
But according to a report by Matt Law for the Telegraph on Sunday, the striker's continued improvement is no fluke.
Pochettino and his staff are said to keep Harry on his toes
The purpose? To ensure the 22-year-old leaves no stone unturned when analysing the methods of football's other top goal-getters.
"Harry, are you watching?" a typical message will read, according to Law.
"Rewind it and watch it again," Kane is then instructed. "Look at the finish, how he found a yard of space, watch the defender’s movement."
And having delivered his own assessment, further instruction awaits the White Hart Lane academy graduate: "Harry, go back a bit further and watch how far he runs to get into position, have a look at his change of pace."
Kane is set to lead the line for England at Euro 2016
Such dedication is what enabled Kane to progress through Spurs' youth ranks, ahead of others deemed to be better players.
The report lists Cameron Lancaster, now playing for Louisville City in the third tier of American football, Calum Butcher of Burton Albion and Paul McBride, who is no longer in the game, as the three standout talents in Kane's Under-17 age group.
Butcher (L) was promoted to the Championship with Burton last season