Complex sentence: In an effort to reduce the lunch rush in their self-service cafés, Vodafone employed an app made by YES.TAP to help their employees pre-order their lunch and pay in advance, within the app itself.
Split into simpler sentences: In an effort to reduce the lunch rush in their self-service cafés, Vodafone employed an app made by YES.TAP. This enabled employees to pre-order their food and pay in advance, within the app itself.