X's custom timeline feature will sting for TweetDeck mourners

X has launched Grok-powered Custom Timelines for Premium users, starting with early access on iOS.

The feature lets users build topic-based feeds from up to 75 sources, with Android support coming later.

It uses Grok plus personalization signals to help organize content and reduce reliance on the main algorithmic feed.

The rollout brings back a TweetDeck-like workflow, now tied to X’s subscription model via XPro-like access.