The reason you can't download the APP with the QR code: some scan software blocked our this app.
(we suggest you use scanning function of UC browser and other scan software except Wechat)
The QR code in the instruction is too small that we need a phone with high resolution .
Please feel assured that we already magnified the QR code since our second batch of goods.
Here is a solution,you can have a try.
1.Sign into this web: www.fiiband.com with google chrome
2.choose the language "English"
4.Choose IOS download,finish,you can install the app now.
Attached is a more detailed download instruction FYI.
Please have one more try,i believe you can do it this time .
Thanks and waiting for your good news.
Have a good day.