From the early Church Fathers to now.
2 Patristic · 1 Orthodox
“And the hand of the Lord was with them: and a great number believing, were converted to the Lord.”
“"And the hand of the Lord," it says, "was with them," that is, they wrought miracles; "and a great number believed, and turned unto the Lord." Do you mark why now also there was need of miracles, namely, that they might believe?”
“The expression "the hand of the Lord was with them" shows that they were performing miracles. Do you see why miracles were needed now as well? So that they would believe.”
“They then also spoke to them, proclaiming the Lord Jesus, and they all believed, for, he says, the hand of the Lord was with them; that is, they were performing signs. For it was necessary that signs be done in order that they might believe. [CHRYSOSTOM]”
The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.