Google accidentally releases experimental COSMO AI assistant, then pulls it from Play Store

Google Briefly Launches Experimental AI Assistant App

Google this week released and then swiftly removed COSMO, an experimental AI assistant app that appeared on the Play Store before being pulled in what looks like an accidental early launch1

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. The app, which comes from Google Research and weighs in at 1.13 GB, represents a significant departure from the company's existing Gemini offerings by bringing AI capabilities directly onto Android devices3

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The brief appearance of COSMO on the Play Store revealed an app designed to function as an on-device AI agent with extreme context awareness4

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. Unlike cloud-dependent AI services, COSMO is built around a local Gemini Nano model that can operate offline, potentially addressing concerns about battery drain and processing power that typically plague on-device AI implementations2

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On-Device AI Agent With Multiple Capabilities

COSMO comes equipped with several AI skills designed for practical daily tasks. The app includes a List Tracker, Document Writer, Event Suggester, Deep Research mode, and Conversation Summary feature2

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. These tools represent some of the most common use cases for AI assistance, from organizing your day to answering complex questions3

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The app's settings reveal three distinct "Fulfillment Model" options: a hybrid mode that switches between local and remote processing, a PI server-only mode for cloud-based operations, and a Nano-only mode for purely local processing1

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. This flexibility suggests Google is testing different approaches to balance performance with offline capabilities.

COSMO is built to tap into Android's AccessibilityService API to access your screen, though this functionality wasn't fully operational in early testing1

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. The app also includes features for voice match setup and screen access permissions, indicating plans for deeper system integration3

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Premature Release Ahead of Google I/O

The rough state of the app listing, including screenshots squished into incorrect aspect ratios, strongly suggests this was published prematurely1

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. The experimental AI assistant app is now no longer available on the Play Store, having been pulled shortly after tech outlets spotted it2

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With Google I/O scheduled for later this month, industry observers speculate COSMO could be showcased at the event as part of Google's broader AI strategy2

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. The app appears to be a testing ground for future AI experiences rather than a consumer-ready product, suggesting Google is exploring how to deliver more sophisticated on-device intelligence4

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What This Means for Android Users

COSMO represents a potential shift in how AI assistants operate on mobile devices. By processing requests locally through the Gemini Nano model, the app could offer faster responses and better privacy compared to cloud-dependent alternatives. The context awareness capabilities suggest an AI that can understand and act on what's happening across your device, though this level of access raises questions about user comfort with such deep system integration4

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Whether COSMO will eventually reach the public remains uncertain. Google has a history of testing internal tools that never see wide release, but the app's appearance on the official Play Store account rather than a developer testing channel hints at broader ambitions2

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. As Google continues to integrate Gemini across its product catalog, COSMO may signal the next evolution in how AI assistants function on Android devices.