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TwinViewer

TwinViewer is a dual-screen photo viewer application.
Category Price Seller Device
Photo & Video Free Masako Sakanashi iPhone, iPad, iPod

It's a powerful tool to organize your photos.
You can compare two photos side by side, pick a better shot, leave one and delete another.
This can also serve as an EXIF viewer.


----- HOW TO USE -----

- Swipe left/right to browse next/previous photo.
- Pinch open/close with two fingers to zoom in/out.
- Double tap either one to display in full-screen mode.
- Sync/Async button to switch the sync mode between two viewers.
- Swap button to switch two images.
- Data button to show data such as image size or shooting date.

If you upgrade to the full version, you can
- delete photos from the album,
- save photos to another album,
- display detailed EXIF data,
- export or share conbimed photos (Camera Roll, email, SNS),
- select photos to browse with no limit.

----- NOTE -----

* Supported only for iOS 8.1 or later.
* The Privacy Settings for Photos need to be active. Open Settings app > Privacy > Photos > Turn TwinViewer ON.

Reviews

Great little app. (Update)
rarelyposter

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!


Great support from developer!
rk54

First, the app is terrific. I use it to compare images that can be used as examples that show complementary or dissonate differences for teaching. The ability to save as a combined image with captions is just what I needed. And who knows, I could use it to create the next “woman screaming at the cat” meme. Second, the developer is super-responsive. I emailed a suggestion about Sort Order and in less than 3 days, the app was updated!


Love it
767j767

This is an awesome app. Thank you developers!


Odd Problem
Cranky Media Guy

I like the app but I can’t find any way to upgrade to the paid version. That’s a problem I haven’t run across before. Can you please fix it? Thank you. UPDATE: I got a response from the developer explaining how to address this problem. Now that I was able to upgrade, I’m happy to give this app five stars.


Minor issues
cmhawke

Would be great if Recently Deleted were an available folder on the menu, seeing as more and more apps have managed to implement this option. Otherwise, best tool for comparing images that I've used; more convenient and quicker than using the layer method in the typical photo editor. Update: the below is now fixed, thanks! I noticed (I believe within the last few versions) that the iOS status bar at the top (containing network info, time, battery and other indicators) no longer disappears when attempting to view an image full-screen in the app. This makes image comparisons more difficult or less convenient in some situations (e.g. screenshots taken in the app of zoomed-in portions of an image pair). It would be appreciated if this issue could be fixed by either hiding the status bar and ensuring the image is truly full-screen, or at least giving the option to completely hide it.


Great Viewer
JW+CIA

I was looking for an app to open my video game app to play on my card board viewer. *box app allows viewing on my iOS devices now, but no way to split . I tested this app with a screen shot and applied it to both screens , placing my phone in my VR device and it worked perfectly once my eyes adjusted. This is the closest thing I found. If I could open the app instead of a photo and mirror the other side it would allow me to view whatever I want on a portable viewing system anywhere anytime, sitting laying or standing. Without spending $600 on a proprietary VR and AR devices. If the developers can make that I would purchase it. This app does what it says , but can be so much more. Thanks.


Simply the best app for comparing two photos
G77777777777777777!

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


The cost is less than a beer...
Alejoarzia

I work construction and this app has helped when it comes to comparing before and after pics side by side as opposed to flipping back and forth... not to mention the time/date stamp available for each pic. Well worth $3!!! Never mind that’s the cost of a cheap beer.


Poor choice
fakegrass

Difficult to use


Resize plz
Kyle C

Would be great if I could drag the center line. I use this app for reference next to a drawing app, and wish I could make the top or bottom image larger.


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