Core Insights - The decline of mobile assistant applications, exemplified by the shutdown of 91 Assistant, highlights the obsolescence of once-popular tools in the smartphone ecosystem [1][16][27] - The mobile assistant market, once thriving, has diminished due to the evolution of smartphone technology and user behavior, leading to a shift towards integrated solutions and cloud services [18][21][23] Group 1: Historical Context - Mobile assistants like 91 Assistant, iTools, and others were once essential for managing smartphones, especially in the early days of iOS and Android [4][9][11] - The acquisition of 91 Wireless by Baidu for $1.9 billion in 2013 marked a significant moment in the mobile assistant landscape, but ultimately, the sector did not evolve as expected [11][13] Group 2: Market Dynamics - The rise of cloud services and improved smartphone capabilities reduced the need for desktop-based management tools, leading to a decline in the relevance of mobile assistants [18][21] - Users have shifted towards paying for quality applications, diminishing the appeal of mobile assistants that facilitated piracy and sideloading [20][21] Group 3: Current Landscape - While many mobile assistants have ceased operations, some have adapted, such as Aisi Assistant, which now focuses on providing verification reports for second-hand devices [24][30] - The transition of Coolapk from an app market to a digital community illustrates how some players have successfully pivoted in response to market changes [25][27]