What currency does Maldives use and where is it more cost-effective?

The common currency of Maldives is USD, which is mainly used in hotels. Most resort islands accept popular credit cards. Male, the capital, can reach both. The landlord can exchange some large US dollars in China, and when he arrives at Male Airport, he can exchange a small US dollar of 1 at Male Airport, which is mainly used for tipping on the island (Maldives has the habit of tipping). The landlord can also change it at the front desk of the hotel after going to the island, but there may be some formalities, so if it is more cost-effective, it is recommended to change it at Male Airport.