You can use Scan Exact option to find exact photos from your iPad / iPhone. Just follow few simple steps to remove exact duplicate pictures.
Step 1: Scan entire iOS device
Once you click Scan Similar option, the app will scan entire device and display all similar photos in sets as shown in below fig.
Step 2: Remove Exact Photos
To delete desired photos from a set, just tap on the checkbox option provided on the photo itself and then tap on Delete icon.
To delete multiple sets of photos, just tap on checkbox option provided at top corner of each set and then tap on Delete icon.
(Note: While deleting exact photos, application will ensure that one best copy of photos in each select set is kept safely in your drive.)
Step 3: Preview / share Photos
You can also view photos before deleting it by just tapping on it and even you can zoom out / zoom in the picture. (Refer below fig.)