You are downloading the Reflex Checker AppX file v22.214.171.124 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 126.96.36.199 AppX file
Note: 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.