File Property Edit

Batch change files' properties, including date time and system attributes, PDF's properties, photo's EXIF, IPTC, GPS tags, MP3 ID3 tags, M4A, MP4 and other popular media files' tags. Change file time and system attributes is Free! In-app purchase available for changing photo files (USD $9.99), media files (USD $9.99), and PDF files (USD $4.99). The property value can be set using variables, e.g. use today's date time, use filename, create number series, create date time series, copy from other property value, replace, truncate, uppercase, lowercase ... The easy to use "undo" feature allows you to rollback all the changes you just made. It also supports quick preview feature, which allows you to see the file's thumbnail while you edit it.