Features & Capabilities

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.

User Growth & Download Statistics

App
By:
Masako Sakanashi
Version:
12.3 Last updated: 2024-07-09
Version code:
867345514
Creation date:
2012-06-10
Compatible devices:
Size:
947.00KB
URLs:
Website ,Privacy policy
Full description:
See detailed description
Source:
Apple Apps Store
Data ingested on:
2026-06-06
Compare stats and ranking:

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.
Developed by:
Masako Sakanashi
Apple Apps Store
https://apps.apple.com/cn/app/twinviewer/id531595249?l=en-GB
Website:
https://www.sakanapps.com

User Reviews

TwinViewer shines for fast, intuitive side-by-side image comparisons, ideal for culling large photo libraries and teaching before/after concepts. Reviewers praise its ease of use, speed, and a one-time purchase model, along with responsive developer updates. A common drawback is the paywall to save/export, with several calling the pricing deceptive. Upgrade flow can be unclear, and a few users report reliability bumps. Overall, it’s a strong tool for photographers who don’t mind paying for export functionality.
Pros
  • Very easy to use with an intuitive UI; praised for speed and simplicity in side-by-side comparisons.
  • Excellent for handling large photo libraries and quick culling.
  • Great for before/after comparisons, teaching, and saving combined images with captions.
  • No ongoing subscription; one-time purchase is seen as good value.
  • Developer responsiveness and timely updates based on user feedback.
Cons
  • Free version restricts saving/exporting; you must upgrade to save images.
  • Perceived deceptive pricing / paywall; some reviewers call it a scam.
  • Upgrade flow can be unclear or hard to locate; accessing core export features requires payment.
  • Occasional reliability issues reported by some users (e.g., features not working until upgrade).
Recent reviews
Tried many iOS apps and Windows apps on a Surface pro. This single app is the reason I bought my new iPad. Nothing came close to the ease of use, speed, features, intuitive UI, support, etc. Had over 10,000 photos I needed to cull quickly and this app fit the task perfectly. 1 very cool feature is the ability to flash full screen images back-and-forth to compare very minor detail. I had 1,000’s of whale photos with very minor differences in details and focus which made this feature alone well worth the price.
by Ju*****, 2025-01-05

The app is saying there are no images to view
by em*****, 2024-09-25

I’ve tried so many apps for side by side before and after photo comparisons and this is definitely the best and easiest to use. Development team is also SUPER responsive!
by So*****, 2024-05-07
View all user reviews ›

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