Xin Lang Cai Jing·2025-09-02 15:26Core Points - 91 Assistant, a mobile management application, will cease all services on September 27, 2023, due to business adjustments and product iteration needs [1] - Users are advised to back up their data before the service termination, as all data will be permanently lost post-closure [1] - Refunds will be available for users with active memberships, but users must proactively apply for refunds by September 15, 2025 [1] Company Background - 91 Assistant was developed by a team under NetDragon and launched in 2007, initially providing services for jailbreaking and managing iPhones [5] - The application expanded to the Android platform in 2009 and captured nearly 90% of the domestic mobile assistant market by 2012, with over 100 million users and more than 10 billion downloads [5] - In 2013, Baidu acquired 91 Wireless, the parent company of 91 Assistant, for $1.9 billion, marking the largest acquisition in China's internet sector at that time [5] - Post-acquisition, 91 Assistant was rebranded as Baidu 91 and integrated with other Baidu products, achieving a market share exceeding 50% in 2014 [5] - The rise of official app stores from Apple and Android manufacturers diminished the need for third-party tools like 91 Assistant, leading to a decline in its relevance [5]