Some photo editing apps erase the EXIF data from your photos. Those kind of apps are available on both computers and mobile phones.
Unfortunately there's not much we can do about it. The only option is to change the photo editing app to another one.
If you use Lightroom
Remember to select "Include All Metadata" when exporting your photos from Lightroom. Otherwise the EXIF data will be erased.
If you use Photoshop
Save your files using "Save as..." not "Save for Web..." The latter option completely erases EXIF data from your images.