Kylie Jenner distracted by her cell phone during a date with with Tyga in Calabasas

Kylie Jenner recently celebrated the successful launch of her new app, with the youngest member of the Kardashian clan's proving to be significantly more popular than her sisters'.

However, it seems the 18-year-old's new project may be taking up a bit more of her attention than her boyfriend Tyga, 25, would like.

The rapper was spotted looking painfully bored as the pair were out to dinner in Calabasas, California on Sunday, as Kylie seemed pretty preoccupied with her cell phone. 

See more pics after the cut...