DAK the Shanghai Metro payment app? Chinese characters please

it’s called 大都会

I use this one 上海交通卡
if you have an iphone, you can change your itune app store country to china, activate the transportation card on your iphone wallet, and then switch your country / region back to wherever it was.

Alipay has a payment system for public transportation that works on buses only… whereas wechat works on both i think