Daily Report

In Fallout Shelter, for each day you play, you are rewarded with caps based on your vault's Happiness. On the seventh day, you will receive a Lunchbox (Fallout Shelter). The amount of time until the next evaluation is displayed in the daily report. You can find the daily report by tapping the objectives tab in the pipboy and switching the the daily report tab.

Caps Gained
The number of Bottle cap (Fallout Shelter) you gain is dependant on the vault happiness during the evaluation. Based on the happiness rank, an independent variable, will net a variable amount of caps.