Google Briefly Lists and Pulls COSMO From Play Store

With a company as massive as Google, there’s always something in development behind the scenes. Some projects are announced, some quietly tested, and others slip out before they’re ready. That last scenario just played out, as Google briefly published an app called COSMO on the Play Store, only to pull it shortly after.

COSMO leak points to Google’s bigger push for on-device AI

COSMO appeared on the Play Store recently before being pulled within hours (via 9to5Google). Users who didn’t install it in time are now met with a “not found” page, suggesting the release may have been accidental. Described as an experimental assistant, COSMO seems to overlap heavily with Gemini.

Google says it can help organize tasks and answer complex questions, but that’s hardly new territory. The bigger story is how COSMO operates, hinting at deeper testing of on-device AI combined with cloud processing.

The app reportedly includes support for Gemini Nano, Google’s lightweight local AI model, alongside a remote server system. There’s also a hybrid mode that switches between local and cloud resources. This approach could help balance performance and battery efficiency, something that remains a major challenge for mobile AI deployment.

COSMO also taps into Android’s accessibility framework, allowing it to read and interact with on-screen content. In theory, that could make it far more context-aware than current assistants. In practice, early testing suggests many features aren’t fully functional yet, reinforcing the idea that this build wasn’t ready for public use.

Despite its rough edges, COSMO includes a range of tools like document writing, conversation summaries, and event suggestions. Its sudden removal raises questions about whether it was an internal test or a preview of something bigger. With Google I/O 2026 approaching, there’s a chance COSMO or its features could resurface in a more polished form soon.