Do I need an app or can I do It with only my HTC One?
That data is embedded in the image's EXIF data. So it's there, but not visible. You can use a site like this one (works well on mobile too) to view an image's EXIF data.
my suggestion to you is, use this app named "Auto Stamper" which help you out to add Geolocation to photo while you capture photo with your HTC phone.