Build Phone

The Build Phone (ビルドフォン) is Kamen Rider Build's personal smartphone and one of his inventions. It can also transform into Build's motorcycle utilizing the Lion Full Bottle.

Apps
The Build Phone, like regular smartphones, is equipped with mobile apps.
 * Helmet: This app appears when the BuildPhone is in its vehicle mode. When activated, a motorcycle helmet will materialize for Sento or a passenger rider to wear.
 * Mail: An Email app. Usually used to read messages sent to the phone and announces a message has come with the retro phrase "You've got mail!".

Machine Builder
The Machine Builder (マシンビルダー) is the vehicle mode of the Build Phone.

The Machine Builder is equipped with a GPS navigation and at full speed can run up and down the sides of buildings or the Skywall. The bike can also use its phone apps for various functions.