Mobile Web Is Top of Funnel, Mobile App Is Bottom of Funnel
avc.com
avc.com
They often use very shoddy methodologies, and just estimate in places where there is no data-- in fact, when they have no data that's even better.
Take anything coming from one of these companies with a grain of salt-- it's not real research (like Mary Meeker's reports, those are real research though she too often relies on these as source material, alas, these days.)
This is telling big wigs and enterprise companies what they want to hear, so that they can take them to their bosses and prove that whatever strategy it is that the bigwig wants to undertake is supported by "data".