Learn vocabulary using the Leitner Box algorithm with four stages: initial, review, recall, and elimination. Advance words through stages by testing retention. Choose from three learning modes: quick review, spelling, and listening.
Create and edit diagrams with freehand drawing, shapes, and text. Organize files into groups. Automatically save edits and sync across devices using iCloud. Backup drawings to prevent data loss. Manage multiple files without manual saving.
Receive push notifications across all devices using an API and access token. Customize notification channels and deploy a node server for management. Support Lua plugins for extended functionality.
