BTmono is a free tool that lets you stream audio to a Bluetooth mono headphone. This audio widget serves as a bridge between your handset and your mono headphone. In doing so, this app essentially makes your headset perform like a stereo device. Aside from its audio capabilities, this app also allows you to choose what kind or color it appears as on your home screen.

Aside from making your mono channel headphone usable with modern devices, BTmono also comes with features that make it a valuable companion, whether you’re answering a call or streaming music from Spotify.

New life for mono audio devices

Once a commonplace audio output device, mono headphones have fallen behind their stereo counterparts. With BTmono, however, you can enjoy them once more. By default, stereo sound systems streaming to a mono audio device would only transmit one channel, resulting in an incomplete experience. While it works for answering calls, as with people doing something else, it’s less advisable for enjoying quality music, and this app resolves that.

As for the app, it makes for minimal intrusion. The only permission it needs is to access your Bluetooth adapter, and you can set it to automatically open and connect when the app is running. Of course, it keeps you informed of the device status through a small status bar, sending notifications as needed. Lastly, it comes with limited support for Skype users.

Still, there are a couple of restrictions to this app. For one, certain features are hidden behind a paywall. The widget add-on plus the ability to auto-restart after phone calls are among the features inaccessible to free users. Additionally, it has no universal functionalities, working only on a selected set of headphone and Bluetooth mono headphone models — and there is no list to check out which works.

A good tool for selected devices

As a Bluetooth mono headphone adapter app, BTmono definitely works well as advertised. If you’re one of the people who prefers a one-eared audio device, then this will allow you to enjoy that device to its fullest. It has a couple of features that require a premium subscription in order to access but it doesn’t diminish what the base version can do.