CompareShots - Image Compare

Edit: 4 years later and this app is still great at what it does. Thank you dev for continuing to support the app all these years! Old: Been using it for years and at the 1 thing it does, it does the job amazingly well. The feature set it has does have everything you need to do the job of letting users compare 2 photos, whether it be by flip flopping between the two, or with one adjusted for transparency to see differences.