The local currency in Zanzibar is the Tanzanian Shilling (TZS), and it's advisable to exchange currency at official banks or exchange bureaus for the best rates. ATMs are widely available in major towns and tourist areas, although it's recommended to carry cash for smaller establishments. Credit cards are accepted at larger hotels, restaurants, and shops in tourist areas, but it's always good to have some cash on hand. Mobile payment options are not widely used in Zanzibar, so it's best to rely on cash or cards.