TwinViewer

I’m a photographer and retoucher. So it’s nice to be able to compare the original photo with the retouched photo. After the response from the developer I found the exact feature I was looking for. I missed the instruction in the beginning! My mistake! Being able to tap to quickly switch back and forth between the photos so I can easily see what has been changed. Perfect! Paid for the full version after finding this out! I guess another neat feature would be if there was also an option to have a slider to compare photos. Where you could slide to your finger back and forth and reveal the second image. Similar to the app “Photo Compare.” This would be a really cool way to compare images. But the app is already wonderful! This is exactly what I’ve been looking for! ありがとうございました！素敵なアップです！

Best tool for comparing images that I've used; more convenient and quicker than using the layer method in the typical photo editor. Would be perfect if Recently Deleted were an available folder on the menu but given that most apps don't have that, I'm not complaining! Thanks so much!

Simply the best app for comparing two photos!! The developer regularly maintains the app too.

As a semipro photographer, I am often trying out different apps and different settings to find the optimum one for a particular photographic situation. This app makes it almost trivial to compare two photographs side-by-side. The linked zooming and panning feature is tremendous. I also like that as you swipe through a photo gallery both pictures change in synchronization. So if you have one picture next to another you can move through sets of two very fast. It is also very helpful for finding the best pose during a portrait session, or in general to find the best image in a series. The only suggestion I have is to put a filmstrip view at top to make it easier to select a different picture that is close to the current set of pictures that you're using, without having to go all the way back to the Camera Roll. I have 500 pictures in my Camera Roll currently. Let's say I'm looking at picture number 450 compared with picture number 452 and I would like to compare 450 with 454 without jumping back to the Camera Roll. If I could scroll just the right-side picture to 454 using a filmstrip (one that shows me two or three pictures on either side of my current picture) that would be great.

If you have many photos and are sensitive to photo quality, this app will help you greatly. The usability of viewing two photos, in linked pairs or separate, with EXIF displayed, is indispensable. The locked in zoom feature that let's you high zoom into the same area of two photos, and the ability to switch between the selected photos with a tap, is incredibly useful. The app is practically a god send gift to iPhoneographers, extremely useful even at it's FREE price, but once you know how to use it you'll probably opt for paying the cheap 2$ IAP that let's you delete/copy to folder/display full EXIF.