Lock In is a Chrome browser extension designed to improve focus by allowing users to set timers that block distracting websites. This add-on is particularly useful for individuals seeking to enhance productivity by minimizing digital distractions during their work or study sessions. Users can easily activate the timer and select specific websites to block, ensuring that interruptions are kept to a minimum while they concentrate on their tasks.

Once the timer expires or is reset, users can regain access to the previously blocked sites by refreshing the page or opening a new tab. The extension is user-friendly, requiring only a quick pinning to the Chrome toolbar for easy access. Recent updates have improved its functionality, including a more intuitive popup design and the ability to store blocked sites in Chrome's local storage, ensuring a seamless experience across multiple sessions.