There are so many functions of iDiary4D as follows, 1. Track management functions: track management contains "import, export, edit and analysis. Track import functions: from iPTR4D or track files. Track export function: export track as a file. Track editing features: including moving points, adding points, creating routes, editing, segmenting, and merging tracks. Track analysis function: the beginning of the end of the recording time, positioning time, the effective rate. 2. File management functions: The management of any form of file: suitable for a variety of automated records; photos, videos, and recording. Other kind of files can also be managed. Open and edit files: files can be opened and reviewed quickly with different kind of default programs. Files shared among different users easily: copy and paste files; create a shared folder. Import and export files. 3. Files and tracks integration: Files and tracks integrated positioning functions: file manually positioning; tracks integrated with intelligent automatic positioning; time correction of multiple files; time zone function. Track and file integration display function: including the integration of static files and dynamic files synchronization track to replay themselves; also be replayed by time or the speed of track, and can be up to 1024 speed; display tracks by flat, high and speed way. Adjustment function of Timeline display and edit: the two sections of the timeline can do a very fine time control. 4. Theme editing and management functions: Establish theme function: with this theme function to establish a variety of personal records; by the file management features to create a new topic or add the already established theme; by the track management functions to create a new topic or add the already established theme. Theme editing features: editing the various topics that have been established, including subject name, date, time, keyword and description content; adding and deleting the established theme. Theme display features: the file open; file and track integrated of display; file and track integration of a replay function. 5. Search function of files, themes, and tracks: 7D search function: including files, tracks, time, space (the flat and height), range, speed, and keywords etc. Demonstrate a variety of search results: file opening; display of files and tracks integrated; full tracks replaying function. Management functions of search results: export files, tracks and themes; copy of the file; open and edit functions. 6. My map: Edit personal map: integration of maps, tracks and files; landmarks customization; switching satellite images and street maps; switching map language. Features of map: zoom in /zoom out/ pan; full screen map. Print a map: print preview and print out.