Microsoft’s launching Recall for Copilot Plus PCs, a new Windows 11 tool that keeps track of everything you see and do on your computer and, in return, gives you the ability to search and retrieve anything you’ve done on the device.

The scope of Recall, which Microsoft has internally called AI Explorer, is incredibly vast — it includes logging things you do in apps, tracking communications in live meetings, remembering all websites you’ve visited for research, and more. All you need to do is perform a “Recall” action, which is like an AI-powered search, and it’ll present a snapshot of that period of time that gives you context of the memory.

As a matter of fact, everything you do on the PC appears on an explorable timeline you can scroll through. You can also search live meetings and videos thanks to Live Captions, which transcribes and even translates speech.

If this technology sounds familiar, Microsoft tried something less powerful in Windows 10 with Timeline but discontinued the feature in 2021. It’s also because there’s already a very similar app for Mac called Rewind. The software works on M-series Macs and, like Recall, logs everything you do, listens to all of your meetings, and gives you access to a chatbot to recall anything. With Recall, however, you’re getting deep, native integration into Windows, while Rewind is a third-party app you have to install and hand over system permissions.

Recall won’t work with every Windows 11 computer. You’ll have to buy one of several fresh new “Copilot Plus PCs” powered by Qualcomm’s new Snapdragon X Elite chips, which have the neural processing unit (NPU) required for Recall to work.

There are also minimum storage requirements on PCs to use Recall, as pointed out in the feature’s FAQs page:

The minimum hard drive space needed to run Recall is 256 GB, and 50 GB of space must be available. The default allocation for Recall on a device with 256 GB will be 25 GB, which can store approximately 3 months of snapshots. You can increase the storage allocation for Recall in your PC Settings. Old snapshots will be deleted once you use your allocated storage, allowing new ones to be stored.

Microsoft is promising users that the Recall index remains local and private on-device. You can pause, stop, or delete captured content or choose to exclude specific apps or websites. Recall won’t take snapshots of InPrivate web browsing sessions in Microsoft Edge and DRM-protected content, either, says Microsoft, but it doesn’t “perform content moderation” and won’t actively hide sensitive information like passwords and financial account numbers.