BTmono for Android

Quick summary

BTmono is a free utility that lets mono Bluetooth headsets receive audio from modern devices by converting stereo streams into a single-channel output. It acts as an intermediary between your phone and a one-ear headset, adding features such as a home-screen widget and limited Skype compatibility. The basic version covers core needs; several convenience extras require payment.

Core functionality

• Merges left and right audio channels so music and media play through a mono headset.
• Connects your handset with a mono Bluetooth headset to route calls and audio.
• Offers a small on-screen widget that you can customize in appearance and color.
• Provides basic compatibility for voice calls and some Skype use cases.
• Can be configured to open automatically and attempt a re-connection when running.

Access, notifications, and behavior

BTmono requires only access to your device’s Bluetooth adapter to operate. When active, it displays a persistent status indicator and issues notifications to report connection state or errors. The app is designed to be unobtrusive and, when enabled, can automatically establish the Bluetooth link without repeated manual pairing.

Known downsides

• Some useful features are locked behind an in-app purchase, including the widget add-on and automatic restart after phone calls.
• Support is not universal: the app works only with specific headset models and Bluetooth mono implementations, and there is no definitive compatibility list.
• Advanced or guaranteed functionality with third-party calling apps is limited.

Who will benefit

If you prefer using a single-ear headset and want to reuse an older mono Bluetooth device with modern phones, BTmono can restore usable audio for calls and media. The free edition handles the essentials well; however, power users who rely on automatic reconnection, full widget control, or broad headset compatibility may need the paid upgrades or to confirm device support before relying on it.