why DOWNLOAD BOOSTER ( built-in ) does not work with UC browser?

[AC Question]

DOWNLOAD BOOSTER is a built-in android function that enable both WIFI and LTE simultaneously to download a file ( more than 30 mb ) with double speed.it works fine when download from Play store but didn't work with UC browser, WHY ?

 

[belodion]

The app developers may be able to explain, if you email them about it.