Its a scam. Honestly. The only thing if says is take a picture of the background then take a picture of you in the background sitting in something. Then erase that something you were sitting on. Honestly if you want to make cool levitating edits. I can suggest
Picsart~Free
Or
Superimpose~.99 cents
You can do levitating edits and so much more. Dont waste 2 dollars on this PATHETIC APP. I WISH I DIDNT.
Helping you about Levitagram