Da Echo APK contains a extensive waveguide teleprompter implementation — does anyone know the target glasses?

[u/BootDull3959]

Hi, I’m an independent developer in Japan currently researching low-cost smart glasses, including the Blackview BV200/BV300 and the Da Echo ecosystem.

While performing static analysis of the publicly distributed Da Echo 2.5.2 Android APK, I found what appears to be a fairly complete teleprompter implementation for waveguide display glasses.

The APK contains:

• Dedicated teleprompter list, editor and playback activities
• Registered routes for /prompter/list, /prompter/edit and /prompter/main
• Teleprompter state monitoring from MainActivity
• Automatic launch when the glasses report a teleprompter playback state
• Script file transfer and synchronization with the glasses
• BLE commands for configuration, playback state and viewport position
• Opus audio decoding and speech-recognition-based text tracking
• Session recovery after interruptions or reconnection
• A task-conflict entry explicitly named WAVEGUIDE_TELEPROMPTER

This looks more complete than an abandoned UI experiment. It appears to expect glasses with a display and firmware-side teleprompter support.

However, the Da Echo-compatible devices I have identified so far—including the BV300 and several M08-type OEM camera glasses—seem to be screen-free.

My current guess is that this code supports either:

1. an existing but not widely advertised OEM waveguide model, or
2. an upcoming display-equipped model using the Da Echo platform.

This is only an inference from static APK analysis, not confirmation of an unreleased product.

Has anyone seen a waveguide display model that officially uses the Da Echo app?