Google Play displays that BTmono is rated 3.6 by its users. Advertisements are a part of this application. Many users installed the app on their Samsung and Micromax devices.
A free .apk installation package of BTmono 1.3.2 is available from Droid Informer and you can check out users' reviews on this site. Prepare 290 KB of free space on your device for this app installer.
As users mention, you can find a nice UI and full functionality among the benefits of the app. The way users see it, the weak side of this application is Bluetooth issues.