[4] The game stopped receiving major updates from Rovio in 2018, and was removed from the App Store and Google Play in 2019.

This feature is essential on progressing for certain race types may only be repeated if a kart's CC or "Cake Capacity" is high enough, which can be increased by upgrading.

Gems are an in-game currency that is either purchased with real money or slowly gained by competing races.

The July 2015 update added Formula One driver Ayrton Senna to the character roster, he is similar to Chuck and is playable permanently.

Players can race (or visit an ad every few hours) to earn tickets, which can be redeemed to open treasure chests containing coins, gems, and parts.

Energy was still used to initiate races and is now shared across all characters and recharges with time, watching ads, and/or spending gems.

[6] On 12 June 2013, developer Rovio Entertainment posted a teaser trailer website showing the character Red speeding into the distance after a "Ready, Set, Go" countdown.

was one of the first apps released simultaneously on the four major smartphone platforms: iOS, Android, Windows Phone and BlackBerry 10.

[7] This app supports Rovio accounts so players can sync progress between different devices on the same operating system.

[6] Telepods are figures created by Hasbro that was first used for Angry Birds Star Wars II.

When using Telepods, to summon the specific kart it is necessary to scan the QR code each time after the app is fully closed.

Then in 2017, the same year that Rovio closed down production, the tournament game mode stopped working, which shut down.

[7] Tech2 did not like the energy system, which only allows you to play five races with a bird, after which they are locked unless you wait or unlock with crystals (which are slowly earned in-game or with an in-app purchase) and did not like the vehicle upgrade process using in-game currency that is slowly earned by racing or with an in-app purchase for coins.