The app doesn’t require any external attachment to work, it’s self sufficient with the built-in speaker and by simply producing a sound at the resonant frequency of the iPhone speaker (which gives it the maximum amplitude), it pushes enough air waves to blow away candle. 😉
The developer quotes that you can use it to:
Blow out candles, herbs, and refresh your skin during hot summer nights
Of course I’m not that lazy that I use this App on my birthday but its sure fun to make everyone laugh. Check out the demo:
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