The most effective AI application for students to use is likely a combination of tools that can assist with various aspects of their academic life. One such tool is ChatGPT, which can help students with writing and research tasks by generating text and providing feedback on their writing. Another useful tool is Grammarly, which is an AI-powered writing assistant that helps students improve their writing skills by detecting and correcting grammar, spelling, punctuation, and style mistakes in real-time. Additionally, tools like Fireflies AI and Desktopus AI can assist students with note-taking and organization, while tools like Mymap AI and Synthesia can help with creating presentations and visual aids. Overall, the best AI tools for students will depend on their individual needs and preferences, but a combination of tools that can assist with writing, research, note-taking, and organization is likely to be the most effective.