Update README.md

Author: gee1k

README.md

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 **☕️Donate: _[Paypal](https://paypal.me/geeee1k), [Alipay](https://raw.githubusercontent.com/gee1k/oss/master/qrcode/alipay.JPG), [WechatPay](https://raw.githubusercontent.com/gee1k/oss/master/qrcode/wechat_pay.JPG)_**
 
+**📱uPic for iOS: [![uPic for iOS](https://cdn.jsdelivr.net/gh/gee1k/oss@master/uPic/app-store-black.svg)](https://apps.apple.com/us/app/id1510718678)**
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 ## 📑 Introduction
 
 > **uPic(upload Picture) is a image(file) hosting client for Mac.**