Hi James Del Rosario,
It sounds like images you download from Viber seem to be duplicating themselves in your Photos app. I would start by quitting all the running apps on the phone:
Force an app to close in iOS
1. Press the Home button two times quickly. You'll see small previews of your recently used apps.
2. Swipe left to find the app you want to close.
3. Swipe up on the app's preview to close it.
When you have done that restart the device and test the issue again:
iOS: Turning off and on (restarting) and resetting
If it persists I would delete the app, then re install it to see if the issue persists or if that resolves it:
Delete music, movies, podcasts, and other content from your iPhone, iPad, iPod touch
Remove an app using the steps below:
- Tap and hold on the app until it jiggles.
- Tap the X in the upper-left corner to delete.
You might be asked to confirm that you want to delete the app. If you see a pop-up that says, "Deleting [app name] will also delete all of its data," tap Delete.
Thank you for using Apple Support Communities.
Take care,
Sterling