Google Pulls Experimental COSMO AI Assistant App From Play Store

Google briefly published an experimental AI assistant app called COSMO to the Play Store on May 1, 2026, before pulling the listing just hours later [1]. The app, which requires a 1.13GB download, appears to be a developmental testbed for an on-device AI agent capable of deep context awareness [2, 3].

Unlike standard chatbots that require users to switch apps and manually input prompts, COSMO is designed to monitor screen activity via Android’s AccessibilityService API [1, 3]. By observing what is on the display—such as text messages or browser tabs—the assistant can proactively suggest tasks like scheduling calendar events, drafting documents, or setting timers [2, 3]. The app features 14 specific skills, including "Deep Research" for complex queries and "Browser Agent" for automating web-based tasks [2, 3].

A core component of the app is its ability to process data locally using Google’s Gemini Nano model, which allows for offline functionality and potentially greater privacy for sensitive on-screen content [2, 3]. Users can toggle between three "Fulfillment" modes: a "Nano Only" local mode, a "PI Only" server-side mode, or a "Hybrid" setting that automatically switches between the two based on the complexity of the task [1, 3].

The app’s premature release was marked by technical inconsistencies, including poorly formatted screenshots and a bare-bones interface, suggesting it was not yet intended for public use [1, 3]. While Google has not officially announced the tool, the timing of the leak—just weeks before the Google I/O developer conference—has led to speculation that COSMO serves as a testing ground for features that may eventually be integrated into the broader Gemini ecosystem or the Android operating system itself [2, 3].

Whether COSMO will eventually launch as a standalone product or remain a behind-the-scenes research project remains unclear. For now, the app’s brief appearance highlights Google’s push to move AI from simple text-based chat interfaces toward proactive, system-level agents that manage daily digital chores.