You are downloading the Guitar Tuner XAP file v126.96.36.199 for Windows Phone. Guitar Tuner is a free and useful Music app: HugeStar Guitar Tuner, so you can easily use the mobile phone to do tuning for your guitar, and supports up to 44 kinds of tuning style. Easy to use, ... You can now download the offline XAP file to install & try it.
Download Locations for Guitar Tuner 188.8.131.52 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.