Suggestions required for good study planning and tracking apps

Inter sept 24 student here. Was originally supposed to give May24 but couldn’t give due to some reasons. I have completed the course nicely since my earlier plan was May24. However I don’t want to lose track and mess up my hardwork by being complacent. And hence I have been revising a few topics here and there but it seems unstructured to me compared to earlier. Any good apps where I can plan/ track my studies so that i can move forward in a certain planned direction and finish on time?