You are downloading the Bass Tuner XAP file v1.1.1.2 for Windows Phone. Bass Tuner is a free Music App: HugeStar Bass Tuner, so you can easily use the mobile phone to do tuning for your bass, supports a variety of tunings style: four-string bass, five-string. You can now download the offline XAP package file to install & try it.
Download Locations for Bass Tuner 1.1.1.2 XAP file
Package File
Please Click Here > to retrieve available package files for Bass Tuner.
Please be aware that the Bass Tuner XAP file you are to download is hosted on the Microsoft Store CDN server. You can read more about Bass Tuner or get it on Microsoft Store.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Bass Tuner XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.