Samsung delivered a major upgrade to the cover screen on the [Galaxy Flip 3](https://www.androidpolice.com/galaxy-z-flip3-review/), making it far larger (and more useful) than the limited display we got on the prior generation. With this year's new [Galaxy Z Flip 4](https://www.androidpolice.com/samsung-galaxy-z-flip-4/), Samsung's keeping that size the same, and while [One UI has improved](https://www.androidpolice.com/samsung-one-ui-5-beta-hands-on/) over the past year, the Flip 4's cover screen is still pretty limited in what it can do. If you’re looking to get a little more usability out of this 1.9-inch screen, [CoverScreen OS](https://www.androidpolice.com/coverscreen-os-for-the-samsung-galaxy-z-flip3-adds-nifty-tricks-and-cool-visuals-in-latest-update/) is here to help, now extending support to the Z Flip 4.