How can I obtain gems in Mario Kart Tour?

To obtain gems, also known as rubies, in Mario Kart Tour, one can engage in various methods within the game. Players are primarily rewarded with rubies by completing in-game tours and cup challenges, progressing through the tier system in ranked races, or fulfilling certain event tasks that may offer them as a prize. Additionally, logging in daily can accumulate rubies through bonus rewards over time. For those who wish to acquire rubies more quickly, they have the option to purchase them via the shop using real money. The shop offers different bundles of rubies, allowing players to choose how many they'd like to buy based on their needs and budget. It is important to note that spending money is not necessary to enjoy the game, as patience and skill in completing challenges can also yield a steady supply of gems.