Apps · The Apps window and launcher
Where can I see how much space my apps take on my Mac and on my fast drive?
Short answer: The All Apps grid shows totals for apps On this Mac and on your Fast drive (including caches), and each row on the Internal tab shows that app's size.
At the bottom of the All Apps grid, Storage Studio shows two totals: On this Mac and Fast drive, plus a combined total that includes app caches. On the Internal tab each row shows that app's own size.
The Offloaded tab shows how many apps are archived and how much space they use on the drive.