There are two available reports for Apsis: "Transactionals report" and "Sendings report"
Available for all reports
Dimensions
Date
From email
From name
Newsletter ID
Newsletter name
Metrics
Bounces
Clicks
Opens
Sendings report only
Dimensions
Newsletter subject
Send queue ID
Status message
Metrics
Opt outs
Sends
Unique clicks
Unique opens
Transactions report only
Dimensions
Project ID