Time management apps and extensions for web browsers can be helpful if you’re not disciplined enough to resist online distractions. If you want to be more productive, here are some tools that let you set time limits for web browsers and web apps.

RescueTime is a desktop and mobile application that tracks how much time you spend on specific websites and apps. A free membership gives you the ability to set goals for how you want to spend your time, as well as weekly and quarterly reports. You can also use RescueTime to receive notifications when you’ve spent enough time on a certain activity, block specific websites, log achievements throughout the day, and more.

Want to see exactly how much time you spend on specific websites? Trackr is a simple Google Chrome extension that displays a pie chart to give you a visual idea of how you’re spending your time. According to the developer, it only tracks active time on a web page, so if you leave a lot of browser tabs open in the background, it won’t detect mouse movements or other actions on the web page.

StayFocused is also a Chrome extension that works by restricting your access to time-wasting websites. This particular extension allows you to restrict access for a certain amount of time. You can also set a daily maximum time for access, but once that time is up, those websites will be inaccessible for the rest of the day.