TwinViewer vs Nitro Photo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TwinViewer
View and compare two photo albums side-by-side. This app allows you to pick the best shots, delete unwanted ones, create combined images, and access detailed EXIF data. It offers intuitive gestures for navigation and zooming.
- Dual-screen photo viewing
- Side-by-side photo comparison
- Create combined images
- View EXIF data
- Zoom and swipe navigation
- Sync/Async viewer modes
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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.
Nitro Photo
This powerful photo editor and manager offers flexible storage, extensive camera support, and advanced editing tools. It allows for AI-powered masking, object removal, and a wide range of professional adjustments to enhance your images.
- Flexible storage options (Files.app, external, Photo Library)
- AI-generated masks and object removal
- Extensive camera RAW support
- 16 professional adjustment tools
- Presets, LUTs, and copy/paste adjustments
- Smart album creation
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Introducing Nitro, the brand new photo editor and manager from the developer of RAW Power. Nitro is designed for every photographer and every photograph. Try Nitro for free for 7 days without any obligation. No subscription signup, no nonsense. Requires iOS 16 or later. Easy, Powerful, Fast. Built with the latest technologies, Nitro has exceptional integration with iOS, including the most control over Apple’s RAW decoder. Its combination of flexible storage options, camera support, and editing tools is unmatched by any app. If you liked Aperture or RAW Power, you’ll love Nitro. Flexible Storage Options * Store your images in Files.app, external storage, or use Apple’s Photo Library * Rate, flag, and filter your images by 11 criteria, including rating, orientation and file type * Add keywords to images in the file system, manually or with AI assistance * With Photos, ratings, edits, and smart albums sync over iCloud * With Files.app and external storage, ratings and edits are stored in XMP sidecars * Move originals, ratings, and edits between the Photo Library and Files.app * UGreen NAS is not compatible with Nitro (bug reported to UGreen) Thoughtful purchasing and trial options * Try the app with absolutely no obligation. No signup, no unexpected charges. * Buy the app once, or get an inexpensive monthly and annual plan * All purchases include all platforms: macOS, iPhone, and iPad! Stop waiting for camera support * Supports more cameras than Photos, Darkroom, or Photomator, including compressed Fujifilm, Nikon HE and GoPro RAWs * By far, the most control over Apple’s RAW decoder. Fine tune your RAWs with noise reduction, moire, ProRAW tone mapping, and more. Seeing is Believing * View detailed metadata side-by-side * Synchronized Pan and Zoom of up to 4 images at once (iPad only) * Comparison mode helps you pick your favorites from a burst * Light and Dark user interface modes Masking with AI * AI-generated masks to quickly isolate a subject or background * Linear and radial gradients with invert and control over the ramp * Brushes provide full control over your mask, including softness, strength, and size * Edge Aware brushes automatically follow contours * Fine tune AI and gradients with brushes for maximum control Quick Fixes * Remove objects using Generative AI * Clone * Spot/Wire Removal * Highlight Recovery * Auto Enhance 16 Professional Adjustments * Tone, Enhance, White Balance, RAW * Crop, Lens Correction, Perspective * Levels, Curves, HSL, Split Toning * Detail, Depth, Black and White, Vignette, Channel Mixer * Apply most adjustments to masks including Levels, Curves, Blur, HSL, and Fringe control Presets, LUTs, and Copy/Paste * Quickly enhance images with a large set of presets and LUTs * Import your own LUTs and make your own presets * Advanced Copy and Paste of adjustments * Camera presets let you apply adjustments automatically by camera model Do More with the Photo Library * Make Smart Albums with complex queries * Search by file name, file type (including RAW+JPEG), and more * Sync everything over iCloud * Edit inside Nitro or with the included Photo Editing Extension Do More with the File System * Rate, flag, and edit non-destructively * All data is stored in XMP sidecars next to your originals * Search by file name, camera, lens, ISO, and more Workflow the way you want * Batch processing of presets, rotation and export * Export with control over size, compression, format, and metadata * Launch other apps after export for custom workflows * Integrated watermarking with both images and text * RAW Power edits are 100% compatible with Nitro After the trial, you need to purchase the app or subscribe to use all the features. Privacy Policy: https://www.iubenda.com/privacy-policy/68647707 Terms of Use: http://www.apple.com/legal/itunes/appstore/dev/stdeula
Screenshots
Verdict
The clearest difference is rating: Nitro Photo at 4.8 against TwinViewer's 4.0. Nitro Photo also leads on review sentiment (86% vs 63%). On price, ratings volume, update cadence and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. TwinViewer sells 1 one-off in-app purchase and Nitro Photo sells 9 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
Nitro Photo holds the better App Store score, 4.8 against 4.0. Both are backed by a comparable volume of ratings — 24 and 63 respectively. Written reviews point the same way: 63% of TwinViewer's written reviews are positive against 86% of Nitro Photo's.
TwinViewer ships an update every 5 weeks, Nitro Photo every 3 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.
| Parameter | TwinViewer | Nitro Photo |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (24 ratings) | 4.8 (63 ratings) — better |
| Positive reviews | 63.4% of reviews | 86.4% of reviews — better |
| Number of ratings | 24 | 63 — better |
| Update frequency | Every 5 weeks | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, Mac — better |
| Requires iOS | 16.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 1 MB | 299 MB |
| Age rating | 4+ | 4+ |
| Developer | Masako Sakanashi | Gentlemen Coders |
Customer experience
TwinViewer
Nitro Photo
Bugs and requests
TwinViewer
Not enough reviews yet to summarise bugs or requests.
Nitro Photo
Reported bugs
3 issues- Crashes when processing large batches of photos
- Incompatibility with older devices
- Editing controls not always responsive
Requested features
4 requests- Luminosity masks
- Keyboard navigation
- Folder thumbnails
- Location and time editing
In-app purchases
TwinViewer
- Full VersionFree
Nitro Photo
- Monthly (RAW Power Discount)$2.991 Month
- Monthly Plan$3.991 Month
- Annual (RAW Power Discount)$19.991 Year
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- Annual Plan$29.991 Year
- 7 Day Free TrialFree
- Full Version (RP - No Discount)$79.99
- Lifetime (RAW Power Discount)$79.99
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- Full Version (No discount)$99.99
- Nitro Lifetime Purchase$99.99
Questions
Is TwinViewer free?
Is Nitro Photo free?
Which has better reviews, TwinViewer or Nitro Photo?
Do TwinViewer or Nitro Photo have ads?
Which is updated more often, TwinViewer or Nitro Photo?
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