1. Khan Academy: A comprehensive app with video lessons, practice exercises, and interactive quizzes in various subjects.
2. Quizlet: A powerful study tool for creating flashcards, quizzes, and acquiring knowledge through games.
3. Duolingo: Perfect for learning a new language, this app offers fun exercises, vocabulary practice, and interactive lessons.
4. Grammarly Keyboard: Enhance your writing skills with this grammar and spell-checking tool right on your smartphone.
5. Wolfram Alpha: A computational knowledge engine that provides solutions to complex math problems and answers various inquiries.
6. Evernote: Keep track of your notes, create to-do lists, and organize your thoughts with this versatile note-taking app.
7. Google Drive: Store, sync, and share files, documents, and presentations with this cloud storage service from Google.
8. Forest: Improve your focus and productivity by using this app, which encourages you to stay away from your phone for a set amount of time.
9. Todoist: Stay organized and manage your tasks effectively with this app that lets you create to-do lists and set reminders.
10. Photomath: Solve math problems by simply taking a picture of the equation, and get step-by-step explanations for better understanding.
11. Pocket: Save articles, videos, and web pages to read or watch later, even when you’re offline.
12. MindNode: Create mind maps and brainstorm ideas visually, helping to organize your thoughts and enhance your creativity.
13. TED: Dive into a vast collection of inspiring and educational talks from experts in various fields.
14. Forest: Boost your mental well-being with guided meditation and mindfulness techniques provided by this app.
15. Canva: Design stunning graphics, posters, presentations, and social media posts with this user-friendly graphic design app.
These fifteen free apps are great resources for students in Junior High and High School, covering a wide range of subjects and helping to enhance learning, organization, productivity, and creativity.