Score Booster is a power-up that was introduced in . It costs 3,000 and is available through the Mystery Box or the Super Mystery Box as a rare item. It is also possible to get it from Weekly Hunts. It increases the player's multiplier by 5, 6, or 7 until the end of the run (depending on how many the player uses).
The Score Booster was added on January 31st, 2013, with the update.
On July 2nd, 2015, the allowed players to use the Score Booster 3 times as they would with Headstarts. The highest multiplier count is 37 (42 with the Special Thursdays).
In , it got a new look.
Trivia
Before it was added to the game, the old Headstart had its place.
Its arrival made the highest possible multiplier to increase from 60 to 70. On Mystery Mondays, the use of the +10 Multiplier, the 2X Multiplier, and the Score Booster increases the maximum multiplier to 80.
The update increased the highest multiplier possible. With 3 Score Boosters, Mystery Mondays, Special Thursdays, and the 2X Multiplier, players can get their multiplier to 104x. However, it is only temporary.
When used, the multiplier will turn blue.
This, the 2X Multiplier, and the missions are the only things in the game that can increase the player's multiplier.
This and the 2X Multiplier are the only power-ups in the game not to be seen held by the character when used.
This, the Headstart, and the old Headstart are the only power-ups in the game that can be used at the start of the game just by tapping them once.
Both the Headstart and the Score Booster give the player a speed boost once they start the game.