Doubao Phone Assistant
#9 in Real-Time Voice & Voice Agentsbytedance · since 2025-12-01 · 2× · last seen Jun 29, 2026
25
Momentum
Doubao Phone Assistant is a mobile AI agent developed by ByteDance, launched on December 1, 2025 as a technical preview on the Nubia M153 smartphone (co-developed with ZTE). The system is integrated at the OS level and leverages the Doubao large language model with a speech-to-speech architecture to autonomously execute cross-app tasks via voice commands – including app control, price comparisons, and bookings through GUI simulation. ByteDance positions itself as a software platform provider without manufacturing its own hardware. According to ByteDance, the product is still in beta and has known limitations, including blocks from third-party apps such as WeChat.
Momentum trend
04.04.03.07.
Features
| Number of Languages | 18 languages in the international version (Cici); 25+ languages for the multimodal translation feature per platform feature description |
| Turn-Taking Latency (ms) | approx. 700 ms (bare-model latency of the realtime voice model, officially stated as "ultra-low delay (about 700ms in the naked model)" with uninterrupted turn-taking) |