~ $ exiv2 --help
exiv2: Unrecognized option --
exiv2: Unrecognized extract target `l'
Usage: exiv2 [ options ] [ action ] file ...

Manipulate the Exif metadata of images.

Actions:
ad | adjust Adjust Exif timestamps by the given time. This action
requires at least one of the -a, -Y, -O or -D options.
pr | print Print image metadata.
rm | delete Delete image metadata from the files.
in | insert Insert metadata from corresponding *.exv files.
Use option -S to change the suffix of the input files.
ex | extract Extract metadata to *.exv, *.xmp and thumbnail image files.
mv | rename Rename files and/or set file timestamps according to the
Exif create timestamp. The filename format can be set with
-r format, timestamp options are controlled with -t and -T.
mo | modify Apply commands to modify (add, set, delete) the Exif and
IPTC metadata of image files or set the JPEG comment.
Requires option -c, -m or -M.
fi | fixiso Copy ISO setting from the Nikon Makernote to the regular
Exif tag.
fc | fixcom Convert the UNICODE Exif user comment to UCS-2. Its current
character encoding can be specified with the -n option.

Options:
-h Display this help and exit.
-V Show the program version and exit.
-v Be verbose during the program run.
-b Show large binary values.
-u Show unknown tags.
-g key Only output info for this key (grep).
-n enc Charset to use to decode UNICODE Exif user comments.
-k Preserve file timestamps (keep).
-t Also set the file timestamp in 'rename' action (overrides -k).
-T Only set the file timestamp in 'rename' action, do not rename
the file (overrides -k).
-f Do not prompt before overwriting existing files (force).
-F Do not prompt before renaming files (Force).
-a time Time adjustment in the format [-]HH[:MM[:SS]]. This option
is only used with the 'adjust' action.
-Y yrs Year adjustment with the 'adjust' action.
-O mon Month adjustment with the 'adjust' action.
-D day Day adjustment with the 'adjust' action.
-p mode Print mode for the 'print' action. Possible modes are:
s : print a summary of the Exif metadata (the default)
a : print Exif, IPTC and XMP metadata (shortcut for -Pkyct)
t : interpreted (translated) Exif data (-PEkyct)
v : plain Exif data values (-PExgnycv)
h : hexdump of the Exif data (-PExgnycsh)
i : IPTC data values (-PIkyct)
x : XMP properties (-PXkyct)
c : JPEG comment
p : list available previews
-P flgs Print flags for fine control of tag lists ('print' action):
E : include Exif tags in the list
I : IPTC datasets
X : XMP properties
x : print a column with the tag number
g : group name
k : key
l : tag label
n : tag name
y : type
c : number of components (count)
s : size in bytes
v : plain data value
t : interpreted (translated) data
h : hexdump of the data
-d tgt Delete target(s) for the 'delete' action. Possible targets are:
a : all supported metadata (the default)
e : Exif section
t : Exif thumbnail only
i : IPTC data
x : XMP packet
c : JPEG comment
-i tgt Insert target(s) for the 'insert' action. Possible targets are
the same as those for the -d option, plus a modifier:
X : Insert metadata from an XMP sidecar file <file>.xmp
Only JPEG thumbnails can be inserted, they need to be named
<file>-thumb.jpg
-e tgt Extract target(s) for the 'extract' action. Possible targets
are the same as those for the -d option, plus a target to extract
preview images and a modifier to generate an XMP sidecar file:
p[<n>[,<m> ...]] : Extract preview images.
X : Extract metadata to an XMP sidecar file <file>.xmp
-r fmt Filename format for the 'rename' action. The format string
follows strftime(3). The following keywords are supported:
:basename: - original filename without extension
:dirname: - name of the directory holding the original file
arentname: - name of parent directory
Default filename format is %Y%m%d_%H%M%S.
-c txt JPEG comment string to set in the image.
-m file Command file for the modify action. The format for commands is
set|add|del <key> [[<type>] <value>].
-M cmd Command line for the modify action. The format for the
commands is the same as that of the lines of a command file.
-l dir Location (directory) for files to be inserted from or extracted to.
-S .suf Use suffix .suf for source files for insert command.

Originally Posted by lokai

Ever heard about exif?

Originally Posted by robthebold

I interpreted the problem being that the tags remained on the phone

Originally Posted by pichlo

Restart tracker? Beware, it will wipe your device clean, IIRC. No pictures, no videos, no SMS, no nothing . . .

Originally Posted by robthebold

I interpreted the problem being that the tags remained on the phone although the images were gone, not that the jpg files had unwanted tags attached. So the list of tags that could be applied to the remaining images still included the "work tags" even though those jpegs are long gone, moved to the PC. So exiv2 wouldn't have anything to work on . . .