Transforming your Android phone into a smart home assistant
Home Assistant users have long had the option to use smart speakers or build their own voice control systems. However, for those with an Android phone, an updated method is now available. Starting in March 2026, the Home Assistant 2026.3 update introduced on-device wake word detection as part of the Home Assistant Companion app. This allows Android users to turn their phones into voice assistants for their smart homes, adding a new level of convenience and flexibility. This update also included new capabilities, such as the ability to direct robot vacuums to specific areas and enhancements to energy monitoring features.
The Companion app gives users the ability to select one of three wake words that activate voice control. Prior to use, these words can be tested to ensure recognition accuracy. Once enabled, the phone remains in listening mode even with the screen locked. This lets users give voice commands to their Home Assistant system, similar to how a smart speaker would function.
Setup process and its limitations
Enabling this feature requires a few simple adjustments within the Companion app. First, users must set Home Assistant as the default voice assistant on their Android phone. Then, they expose selected smart home devices to voice control within the Home Assistant interface. This helps streamline the process so the system can focus on the most relevant devices, avoiding the need to sift through hundreds of entities during command recognition. The Companion app's settings guide users through this configuration step-by-step.
Despite these advantages, an Android phone is not a perfect alternative to a dedicated smart speaker. For example, devices like Amazon Echo use advanced microphone arrays and beamforming technology to capture voice input from different directions. This makes them highly effective in various environments, especially those with background noise. Android phones, however, are optimized for close-range use and may struggle to pick up wake words from across a room. Users have reported that the wake word detection on a Samsung Galaxy S8 works best when they are near the phone, making it less practical for long-distance commands.
Another notable limitation is the absence of feedback when the wake word is recognized. Most smart speakers respond with a visual or audible indication, such as a light or chime. The Android phone, however, gives no sign that it has detected the wake word. Users must issue a command and wait for a response to confirm whether the phone is actively listening, which can be frustrating in some situations.
A dedicated privacy-focused alternative
For those who want a more reliable and privacy-conscious option, the Home Assistant Voice Preview Edition is available. This small smart speaker acts as an alternative to services like Amazon Alexa or Google Nest Mini. It processes voice commands locally without sending data to the cloud, making it a popular choice for users concerned about data privacy. The device connects via 2.4 GHz Wi-Fi and Bluetooth 5.0, and is available in a simple white finish. It is designed to integrate seamlessly with Home Assistant systems and functions as a physical voice assistant.
The Voice Preview Edition has compact dimensions—84x84x21 mm—and weighs just 96 g, making it easy to place in any room. It offers a more consistent performance compared to using a smartphone for voice control, especially in larger or noisier spaces. Since it is still in a preview phase, it is ideal for those who want to experience a dedicated voice assistant without making a long-term commitment. This privacy-focused device provides a local solution for users who want greater control over their smart home systems.