NotebookLM’s most needed feature just finished rolling out

17 Dec 2025, 09:08 by Rajesh Pandey · Android Police

Google keeps improving NotebookLM, and those steady updates have turned it into one of the most impressive AI tools available today. In late October, the company announced that chat history would be coming to NotebookLM, making it easy to continue a conversation across devices and platforms. Almost 1.5 months later, the feature is finally fully rolled out to all.

The official NotebookLM account on X announced that chat history is available to all users across mobile and the web. Previously, conversations didn’t sync between devices, meaning you couldn't continue a chat started on the web from your phone, or the other way around. This created major friction, as you'd be forced to restart long research sessions or lose context every time you switched devices.

Chat history might seem like a small addition to NotebookLM, but it solves one of the biggest pain points with Google's AI-powered notebook. If anything, it's surprising it took Google this long to ship such a basic feature.

Do note that since chat history is only rolling out now, NotebookLM won't display your previous conversations. Still, if you were planning to start a deep research session, you can now do so knowing the history will be preserved.

Besides cross-device sync, you can always delete your chat history. And for shared notebooks, Google clarifies that your chats are only visible to you. The delete option is accessible by tapping the three-dot menu button on the top-left corner within a notebook.

NotebookLM steady march towards greatness

Over the past month or two, Google has rolled out several features that improve the overall usability of NotebookLM. The biggest additions include direct integration with Gemini and support for generating Infographics and Slide Decks from your sources.

For AI Ultra subscribers, NotebookLM also got an Ultra-tier upgrade, adding support for up to 600 sources, expanded limits for Audio/Video Overviews, and priority and highest access to the latest Gemini models.