TwinViewer vs K&S(写真共有カレンダー)
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.
K&S(写真共有カレンダー)
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K&Sは、カップル2人で1つのカレンダーを共有し、その日の写真を日付ごとに残せるアプリです。 予定を管理するためではなく、ふたりの毎日を写真で記録し、あとからカレンダーから見返すために作りました。 【主な機能】 ・カレンダーIDを共有して、2人で1つのカレンダーを利用 ・それぞれ1日2枚まで写真を投稿 ・2人で「せーの」で押すと、共通写真の投稿枠が解放 ・投稿状況をカレンダーの色で確認 ・日付をタップして、その日の写真を一覧表示 ・写真を端末に保存 ・カレンダーの色、背景、フォントを自由にカスタマイズ 毎日の何気ない写真も、日付に残すとふたりだけの思い出になります。 K&Sで、今日の一枚を積み重ねてみてください。 ※本アプリには広告が表示されます。
Screenshots
Verdict
The clearest difference is in-app purchases: K&S(写真共有カレンダー) at none against TwinViewer's 1. K&S(写真共有カレンダー) also leads on update cadence (every 2 days vs every 5 weeks). TwinViewer's advantage is ads (none vs shown). On price, device support and iOS requirement 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. K&S(写真共有カレンダー) asks for nothing beyond the download.
TwinViewer ships an update every 5 weeks, K&S(写真共有カレンダー) every 2 days. The most recent releases landed on October 29, 2026 and September 26, 2026 respectively.
| Parameter | TwinViewer | K&S(写真共有カレンダー) |
|---|---|---|
| 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 2 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 16.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 1 MB | 130 MB |
| Age rating | 4+ | 4+ |
| Developer | Masako Sakanashi | Sota Fukuhara |
In-app purchases
TwinViewer
- Full Version$4.99
K&S(写真共有カレンダー)
No in-app purchases
Questions
Is TwinViewer free?
Is K&S(写真共有カレンダー) free?
Do TwinViewer or K&S(写真共有カレンダー) have ads?
Which is updated more often, TwinViewer or K&S(写真共有カレンダー)?
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