The "비트코인 오더북 - 주요 거래소 시세 정보" app is a useful tool for viewing the order books of domestic Bitcoin exchanges. This app supports the following exchanges: Korbit, Coinone, and Bithumb. It provides information on the average selling and buying prices of each exchange, as well as the exchange with the lowest price for purchasing and the exchange with the highest price for selling.

One of the notable features of this app is that it does not collect any personal information from its users. This ensures user privacy and data security.

Please note that this app does not require any mandatory or optional permissions to function properly. Users can choose to deny any optional permissions without affecting the basic functionality of the app.

If you are interested in monitoring the order books of domestic Bitcoin exchanges and staying updated on the average prices, the "비트코인 오더북 - 주요 거래소 시세 정보" app is a reliable choice.