TwinViewer12.3 - App Store

TwinViewer is a dual-screen photo viewer application.

You can view two different albums simultaneously, compare two photos side by side, pick a better shot, or leave one and delete another.
This is more than just a viewer. You can also create side-by-side combined images, get the detailed EXIF data, etc.
----- 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 viewers.
- Grid Lines button to show/hide grid liens.
- EXIF Data button to show/hide data such as image size or shooting date.
- Snapshot button to created and share side-by-side images.
* Please note that this application can be downloaded for free, but in-app purchase is required to use all functions.

Version History • Enabled 2-finger swipe up to delete photo
• Fixed bugs
• Minor improvements 12.3 07/09/2024 • Added face zoom function by face detection
• Fixed bugs
• Minor improvements 12.2 05/13/2024 • Photo Library Scan option is now enabled
If you have a huge number of images, the quick scan is recommended.
• Fixed bugs
• Minor improvements 12.1 05/07/2024 MAJOR UPDATE!
• Optimized for iOS 17 (Requires iOS 16.0 or later)
• Completely improved user interface
• Supports Dark mode
• Changed restrictions in the free version
(All functions will be available except for limit number of swipe operations when viewing photos)
• Fixed bugs
• Minor improvements 12.0 05/05/2024 - Fixed bugs.
- Minor improvements. 11.7 02/24/2022 - Fixed bugs. 11.6 01/18/2022 - Supported iOS 15.
- Fixed minor bugs.
- Minor improvements. 11.5 11/23/2021 - Fixed a crash bug that occurred on iOS12. 11.4 08/06/2021 - Added original filename to metadata (only if it's different from actual filename)
- Fixed a bug that occurred with in-app purchases.
- Fixed minor bugs.
- Minor improvements. 11.3 08/02/2021 - Supported OS has been changed from iOS13.0 or later to iOS12.0 or later.
- Fixed bugs. 11.2 07/15/2021 - Fixed bugs.
- Minor improvements. 11.1 06/24/2021 - Optimized for iOS 14. (This update needs iOS 13.0 or later)
- Abolished advertisements in order to avoid privacy issues.
- Added "Use Fullscreen" Option.
- Minor improvements. 11.0 01/27/2021 - Added Sort Key Options. 10.8 07/18/2020 - Added Photo Library Scanning Options.
- Added Large Image Handling Options.
- Fixed bugs.
- Minor improvements. 10.7 07/06/2020 - Changed the restrictions of the free version.
- Fixed bugs.
- Minor improvements. 10.6 05/22/2020 - Full version restriction changed.
We have received negative reviews about disabled functions in the free version.
Now all functions can be used but full screen Ads are more frequently displayed in the free version.
Thank you for your understanding.

- Improved thumbnail quality in the image selection screen.
- Fixed bugs.
- Minor improvements. 10.5 04/21/2020 - Quick Access button has returned due to many requests.
- Search Bar added in the album selection screen.
- Ad frequency modified (Free version only).
- Fixed bugs.
- Minor improvements. 10.4 12/06/2019 - Fixed coloring issues in dark mode on iOS 13. 10.3 10/03/2019 - Fixed an issue where the swipe-down gesture to close window interferes with other gestures on iOS 11.
- Minor improvements. 10.2 09/26/2019 - Single-tap gesture in full-screen mode enables simply image switching instead of an overlay.
- Enabled to view EXIF data of two images simultaneously.
- Improved visibility when selectiong photos by marking currently-selected photos with red text.
- Minor improvements.
- Minor improvements. 10.1 09/17/2019 Major Update!
The source code was completely rewritten to add new features and improve performance and usability.

- Optimized for iOS 13. (This update needs iOS 12.0 or later)
- Performance improvements when loading photos.
- Redesigned overall user interface.
- Added new pop-up Action Panels.
- Enable to add "Favorite" marks.
- Grid lines option (Show/Hide).
- Customizable UI.
- Enhanced side-by-side combined image output.
- Minor improvements. 10.0 09/11/2019 - Optimized for iOS 12 (Requires iOS 11.0 or later)
- Minor improvements. 9.0 10/05/2018 - This update needs iOS 10.0 or later.
- Fixed an issue where the auth-layout doesn't work properly in iPad split screen mode. 8.3 02/28/2018 - Fixed an issue where images could not be posted on Twitter and Facebook on iOS 11. 8.2 10/12/2017 - iPhone X supported.
- Minor improvements. 8.1 10/06/2017