Core Points - 91 Assistant will cease all services on September 27, 2025, due to business adjustments and product iteration needs [1][3] - Users are advised to back up their data, as all data will be permanently lost after the service termination [3] - Refunds will be available for users with active memberships, but they must apply for the refund by September 15, 2025 [3] Company Insights - 91 Assistant was a significant asset acquired by Baidu in 2013 for $1.9 billion, marking a key strategic move in the mobile internet sector [3] - At its peak in 2013, 91 Assistant had over 100 million users across iOS and Android platforms, with total downloads exceeding 10 billion [3] - The shutdown of 91 Assistant reflects a broader transformation in the mobile application distribution industry and the end of early mobile internet benefits [3] Industry Context - The discontinuation of 91 Assistant signifies the conclusion of an era for mobile applications, particularly for users who relied on it for jailbreaking iPhones [4][5] - The functionalities of 91 Assistant have largely been integrated into Baidu's ecosystem, diminishing the need for standalone operations [4]