Of course! Uploading pics from your smartphone to FET is easy. The first time you use the app, the app may ask you if FET is allowed to access your photos (if you denied permission at the beginning and want to change it, go to the app settings on your device).
When you’ve allowed this permission, you can then choose to upload a photo from your device’s photo gallery. On FET, you can then select whether the images you upload are visible to everyone, or only shown to your friends.