Search app
CSR Racing 2


Photo & Video & Utilities
Last Update
Jun 11, 2021
View in store

Store Performance Index


Store Performance Index shows overall performance of your app on app stores. It is based on combined ASO & reviews metrics.

See more data

Ratings & Reviews performance for TwinViewer

Ratings & Reviews performance provides an overview of what users think of your app. Here are the key metrics to help you identify how your app is rated by users and how successful is your review management strategy.

Number of reviews,


Avg rating,



967 chars

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 button to show/hide grid liens. - Data button to show/hide data such as image size or shooting date. - Export button to created and share side-by-side images. ----- WHAT'S FULL VERSION? ----- If you upgrade to the full version by in-app purchase, the following restrictions will be unlocked. ・Create and save side-by-side combined images. ・Display image metadata.

 Why to reply to reviews?

User reviews affect conversion to installs and app rating. Featured and helpful reviews are the first to be noticed by users and in case of no response can affect download rate. This is why it is highly recommended to reply to them.

Dec 09, 2019

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!

Sep 18, 2019

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!

Sep 13, 2019

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

Jun 29, 2012

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.

so far so good123
Sep 24, 2016

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.

CSR Racing 2

About TwinViewer

Developed by Masako Sakanashi.

TwinViewer is ranking in   Photo & Video & Utilities

Last update was at Jun 11, 2021and the current version is 11.0.

To see all other keys and revenue click here 531595249

TwinViewer have a 11a user reviews.

TwinViewer was released in the App Store. It is developed by Masako Sakanashi, who have also released the following apps.

TwinViewer has 11 user reviews.​

TwinViewer has an average rating of 4.5. ​The latest version of TwinViewer 11.0​ ​​was ​released on Jun 11, 2021​.

You can download TwinViewer ​here

Find growth insights on our blog

How to Respond to Google Play Reviews

How to Respond to Google Play Reviews

How to Respond to App Store Reviews

How to Respond to App Store Reviews

AppFollow identifies top apps in the App Store and Google Play in 2020

AppFollow identifies top apps in the App Store and Google Play in 2020

React to user feedback and market trends faster