Read and annotate OFD and PDF documents. Open files quickly, access outlines, and navigate using semantic features. Share and print documents. Supports dual format compatibility. Lightweight and secure.
Record daily activities like workouts, overtime, or leave days directly on the calendar via the Today widget. Add marks with three steps: unlock screen, swipe to Today view, and tap the calendar. Backup data to iCloud and support dark mode and iPad.
Learn vocabulary using the Ebbinghaus forgetting curve theory and personalized memory sequences. Track word mastery with spaced repetition. Access audio pronunciations, definitions, examples, and word comparisons.
