OPPO AI Heart Ball review: a 9.8-gram wearable recorder built around phones

GeekPark tested the OPPO AI Heart Ball, a 9.8-gram clip-on recorder that starts capturing automatically when worn and offers up to 24 hours of continuous recording.

The review says it groups related conversations into project timelines, keeps text transcripts without raw audio, and connects to Feishu, WeChat, and MCP-compatible AI tools.

It also notes that the early version works mainly through the separate Bai Jing AI app and is not yet deeply integrated with the phone system, and that it supports only OPPO, OnePlus, and Realme phones.