TwinViewer vs FANDAO
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.
FANDAO
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Fandaoは、ユーザーが所有している画像・動画を見えるアプリです。 SNAFTY ファン会員利用規約: https://docs.google.com/gview?embedded=true&url=https://snafty-app-bucket.s3.ap-northeast-1.amazonaws.com/snafty_policy_jp.pdf
Screenshots
Verdict
The clearest difference is update cadence: FANDAO at every 9 days against TwinViewer's every 5 weeks. FANDAO also leads on iOS requirement (13.0 vs 16.0). On price, ads, in-app purchases and device support 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 FANDAO sells 10 in-app purchases, starting at $0.49 per month. Whichever you choose, the download price is not the number that matters.
TwinViewer ships an update every 5 weeks, FANDAO every 9 days. The most recent releases landed on November 1, 2026 and October 27, 2026 respectively.
| Parameter | TwinViewer | FANDAO |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (24 ratings) — better | — |
| Positive reviews | 63.4% of reviews | — |
| Number of ratings | 24 — better | — |
| Update frequency | Every 5 weeks | Every 9 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 16.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 84 MB |
| Age rating | 4+ | 12+ |
| Developer | Masako Sakanashi | SNAFTY K.K. |
In-app purchases
TwinViewer
- Full VersionFree
FANDAO
- テストプラン$0.491 Month
- テストサブスク Subscription Group$0.491 Month
- テストプラン1 Subscription Group$0.491 Month
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- prod_group_original_plan_3$0.491 Month
- KOL AI Subscription Monthly$0.491 Month
- KOL AI Monthly Subscription$0.491 Month
- KOl AI Monthly Subscription$0.491 Month
- Package Points 13$29.99
- Package Points 16$119.99
- Package Points 17$179.99
