# 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. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://skybreakers-io.gitbook.io/skybreakers.io/currency.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.