You are downloading the Guitar Tuner XAP file v220.127.116.11 for Windows Phone. Guitar Tuner is a free and useful Music app: Turn your mobile phone into a guitar tuner. Very simple to use, just tap the note you want and you will get the corresponding sound in high ... You can now download the offline XAP file to install & try it.
Download Locations for Guitar Tuner 18.104.22.168 XAP file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline XAP 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 Guitar Tuner XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.