Perfect

Very good app. To comment to the ones thatvthink the line should be zero once its on a table is wrong. A car passing on the street is enough to shake an iPhone on a table. A dog barking or your breathing on the table while watching the app is enough to move the needle to not equal zero.

Very nice tool to show students how environmental vibrations effect items.
Try it go to another room and shout if youre loud enough you can move the needle.

Roja6969 about Seismometer