Hello Caroline! Thank you for your question. I will be assisting you today.I'm sorry about the issue. Did you lose one picture or multiple pictures?So you do not see the Gallery app in Apps right?Do you see the Photos app? If yes, can you open it and check?Do you have a windows or mac computer? If yes, can you connect the phone to the computer, and see if you can see the pictures on the phone through the computer?Please reply at the box below. Thank you.
I have lost multiple pictures, I don't see the app in the galaxy list of apps I only see pics I have shared on Facebook & I only have this one device.