For example, the Barcode Scanner app takes up:
Total: 0.96MB
Application: 0.92MB
Data: 40KB
on the phone. When I move it to the SD Card, it changes to:
Total: 524KB
Application: 484KB
Data: 40KB
How come it changes?
Topic app2sd sd-card applications android
Category Android
Like Bryan says (I can't comment so had to add another answer...), it doesn't move the whole app. The size given after the move is the bit still on the internal storage - it doesn't give any size for the elements that have beend moved to SD.
So in answer to your question, the app doesn't get smaller, just amount of internal storage used gets smaller.
As far as I know, it moves as much of the app as it can from the internal storage to the SD card. So for instance, databases, images, or other resources would be moved over. I do not know the exact details of how it works.
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