1. An app that changes wallpaper according to your mood. It can have a drop-down list of moods to be selected by the user.
  2. A ceiling which can give you night sky’s view using a screen.
  3. ACs which can produce petrichor.
  4. A pen that doesn’t work until its cap is fitted to the pen’s back so as to not misplace the pen cap.
  5. A mirror-like device that rates you how good you are looking a particular dress.

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  1. A radio station with no ads! Earns revenue only through movie promotions.
  2. A material that makes it impossible for spiders to make webs on it.
  3. An anonymous chat box on Facebook. You would be able to chat with someone from your friend’s list but identities would remain hidden.
  4. A diary which reminds you to write everyday events in it.
  5. A fragrance detector. A device which can tell you which perfume/deodorant is used by someone from its smell.

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