You are downloading the Graph Touch XAP file v18.104.22.168 for Windows Phone. Graph Touch is a free and useful Education app: Graph Touch is a scientific calculator with a powerful numeric solver and graph plotter. The numeric solver can be used to calculate numeric ... You can now download the offline XAP file to install & try it.
Download Locations for Graph Touch 22.214.171.124 XAP file
Note: To install it manually from an SD card, you should choose one of the server location above to get the offline Graph Touch XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.