Paper Kirei G2 vs SIMSON CASE
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Paper Kirei G2
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Bring Your Phone Case to Life! This app is specially designed for our e-paper phone case. With just a simple tap, you can instantly change the image on the back of your phone case—no charging, no Bluetooth, just easy and fun! Key Features One-Tap Image Change Choose your favorite image and cast it with a tap. It will instantly appear on your phone case. Massive Image Library Enjoy a wide range of illustrations, photos, and calendar templates—fresh inspiration every day. DIY Personalization Upload your own photos or designs to create a phone case that’s truly one of a kind. Energy Efficient Powered by e-paper technology, your image stays on display without consuming power—zero energy in standby mode.
SIMSON CASE
Connect your phone case to customize dynamic watch faces. Design unique animated watch faces to express your style.
- Connect phone case
- DIY dynamic watch faces
- Customize animated designs
- Personalize watch face style
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与手机壳连接，可diy各种动态表盘。
Screenshots
Verdict
The clearest difference is update cadence: SIMSON CASE at weekly against Paper Kirei G2's fortnightly. SIMSON CASE also leads on iOS requirement (12.0 vs 15.6). 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. Neither carries in-app purchases, so what you see is what you pay.
Paper Kirei G2 ships an update fortnightly, SIMSON CASE weekly. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.
| Parameter | Paper Kirei G2 | SIMSON CASE |
|---|---|---|
| Price | Free | Free |
| Rating | — | 2.1 (7 ratings) — better |
| Positive reviews | — | 25.0% of reviews |
| Number of ratings | — | 7 — better |
| Update frequency | Fortnightly | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 14 MB | 228 MB |
| Age rating | 17+ | 4+ |
| Developer | 东海 刘 | Shenzhen United Power Technology Co., Ltd. |
In-app purchases
Paper Kirei G2
No in-app purchases
SIMSON CASE
No in-app purchases
