LeeCo is an awesome app for algorithem problems(including unlock), solutions, discuss(from leetcode) and comments. #Intro ###Main Page In the main page of LeeCo, there are algorithm problems from LeetCode. All the algorithm problems are classified into 29 tags in the sub pages. You can see the degree of difficulty and the being collected times of every problem. Click a problem then you can check the details of the content, solution, discusses(from LeetCode) and comments(from LeeCo) of the problem. Open the drawer menu, there are the information of user(after signing in), all the tags(click to jump to the corresponding sub page), settings, help, feedback and about. There are sorting and searching icons at the top right-hand corner to help you search and read problems.