What's new in 23.0:
• Topic progress: track every subject and resume where you left off
• New Q&A Practice: 127 sets, searchable, with progress
• Unit converter rebuilt: 44 categories, 330+ units
• New scientific calculator with live answers and history
• Ask AI from topics, Q&A and the e-book
• Smarter notes, bookmarks and search
• Fresh modern design, animations and dark mode
• Send feedback directly from the app
• Faster and more reliable notifications