台南幣Play is a mobile app developed by TainanCoin that allows locals and visitors to participate in city events and activities while earning virtual currency called "台南幣" (Tainan Coins). With this app, users can receive notifications about city services, enjoy discounts on purchases using Tainan Coins, and even exchange them for gifts. The app is part of a promotional experiment by local businesses in Tainan.

Tainan Coins are valued at one point per Taiwanese dollar, making them a valuable asset for users who participate in the city's events and activities. Before using the app, users should note that they must obtain written permission from the TainanCoin team to use the currency for any purpose beyond the app.