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Metainfo is a metadata viewer and it helps you to extract EXIF information from photo files. Additionally it can open media files to view album cover, ID3 tags if any and shortly about used bitrate and codecs.
MetainfoEXIF & ID3 tags viewer for iPhone, iPad and macOS
Editor for color collections saved in ASE format. It is well integrated to iOS, so you can see thumbnails in a Finder app, use Quick Look and edit collection just by tap on a file on iCloud or Downloads. Supports ACO, ACT, GPL, JASC-PAL, PROCREATE SWATCHES.
Color Palette Finder for iOSSimple tool to view and edit Adobe Swatch Exchange files