> For the complete documentation index, see [llms.txt](https://skybreakers-io.gitbook.io/skybreakers.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://skybreakers-io.gitbook.io/skybreakers.io/currency.md).

# Currency

The game will use two types of currency.

Silver - allows you to upgrade helicopters for free to play mode, as well as repair helicopters.

Gold - is a currency pegged to SKYT gaming tokens. Allows you to participate in play to earn battles; buy in-app purchases; accelerate repair of helicopters; receive accruals under the referral program.