TBH Google Maps was the killer app that smartphones needed to get off the ground. Out of 13 apps on my home screen, 7 are Google apps. Both Apple and Google did

TBH Google Maps was the killer app that smartphones needed to get off the ground. Out of 13 apps on my home screen, 7 are Google apps. Both Apple and Google did a little more than building the framework and then sitting back... So how do you decide what a fair cut is? Over the course of a month, given all your app and system usage, and all the pieces of software you've touched or relied on, what percent of the engineer hours required for that stuff to work came from Google/Apple vs coming from third party app makers? Is that how you decide the split? Because I have a feeling the time it took to build the 15 third party apps I might touch in a month don't come close to the level of effort required to have built the system and first party apps.