FileClerk-Rename app for iPhone and iPad

** Rename Capability **
- Use 100+ attributes as elements of new name.
- Smart format for different types of value
- Support regular expression to handle complex situations
- Super quick, rename 2000+ files per second
- Recognize potential new name conflicts and warn before action
- Support **Undo**, no need to worry for mistake anymore.

**Filtering Capability**
- Filter file with regular expression
- Filter by file type
- Sort file with different attributes

**Preview Capability**
- Instantly check value of new name for each element.
- Preview file with various of attributes.
- Show GPS location in map.