You are downloading the Reflex Checker AppX file v220.127.116.11 for Windows Phone. Reflex Checker is a free and fun Action & Adventure game: Check your reflex. You have to tap correct rectangle to ... You can now download the offline AppX file to install & try it.
Download Locations for Reflex Checker 18.104.22.168 AppX file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline AppX File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Reflex Checker AppX file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.