For some reason my friends and brother have achievements when they go on Duolingo on the computer. When I log on there is nothing of the sort. Can someone help?
They're part of an A/B test, which allows them to see Achievements. You're one of the unlucky few who are not part of the test. The only thing you can do is wait for Duolingo to release it for all users, which has a possibility of not even happening. (╯︵╰,)