Summary Box: Microsoft pledges generous terms

BY THE NUMBERS: Microsoft plans to give developers who write software for its Windows Store an 80 percent cut if it has made at least $25,000 in revenue. Apple offers 70 percent.

WHY SO GENEROUS: Microsoft is trying to compete with Apple on the app front by luring developers with financial incentives.

WHY APPS MATTER: Apple’s app store has a larger selection than any of its rivals. That means more games, entertainment guides and other apps to extend the functionality of devices. If Microsoft can get developers to write for the store, it can lure more people to Windows products.