Via in-app purchase you can stock up on both rubies (Glu Credits on Android) and coins:
Rubies (Credits on Android)
40 Rubies: $1.99
100 Rubies: $4.99
260 Rubies: $9.99
640 Rubies: $19.99
5,200 Rubies: $99.99
Coins
2,000 Coins: $1.99
5,000 Coins: $4.99
13,000 Coins: $9.99
32,000 Coins: $19.99
260,000 Coins: $99.99
Explore the galaxy in the franchise's first open-world game.