TodoTxt++ app analytics for March 16

Just a simple modern todo.txt app which implement todo.txt format, support dropbox sync. ## Goal This application is inspired by the Todo.txt Touch for iOS designed to manage your personal todo.txt stored in Dropbox. The goal is to be the fastest, simplest, and cleanest implementation possible. ## Features - Full support the todo.txt file format - Dropbox sync - Archive completed tasks to done.txt, either on manually and automatically - Swipe to toggle completion and undo completion - Filter by @context and +project - Sort by order in file, priority, alphabetical, due date, and project - Widget support