duck vs WorldClass PC
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
duck
This app allows users to create and share a digital diary with friends and family. Decorate entries with stickers, build memories through comments, and stay updated with notifications. Enjoy a personalized experience with customizable themes.
- Decorate diary entries
- Share daily life with friends
- Use stickers for colorful records
- Build memories with comments
- Receive diary and comment notifications
- Dark and Light themes
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duck-z is a diary app for sharing everyday life with someone you care about. Write back and forth with friends or your partner, and build memories that are all your own. • Decorate a diary that's all yours • Take turns sharing daily life with friends or your partner • Brighten your entries with stickers • Memories that grow with every comment • Get notified the moment someone special writes • Your story, every day — even when you're apart • Dark and light themes
WorldClass PC
Easily manage your PC cafe experience with features like quick sign-up, QR code login, and in-app payments from your seat. Monitor usage and end your session remotely for ultimate convenience.
- Easy sign-up and login
- QR code seat login
- In-seat payment
- Auto-purchase options
- Remote session ending
- Usage information check
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WorldClass — One account for every partner esports cafe 【Sign up once, log in anywhere】 Register a single time and log in directly at any WorldClass partner location. No need to create a new membership or re-enter your details at each store. 【Scan and go】 Scan the QR code when you arrive to log in instantly, and skip the wait at the counter. 【Coupon management】 Check your coupons in the app, including where they can be used and when they expire. 【Your usage at a glance】 Review your payment history and session times, all in one place. Sign up for WorldClass and make every visit easier.
Screenshots
Verdict
The clearest difference is rating: duck at 4.8 against WorldClass PC's 4.2. duck also leads on review sentiment (98% vs 62%). WorldClass PC's advantage is update cadence (fortnightly vs every 6 weeks). On price, ratings volume, ads and in-app purchases 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.
duck holds the better App Store score, 4.8 against 4.2. Both are backed by a comparable volume of ratings — 12 and 6 respectively. Written reviews point the same way: 98% of duck's written reviews are positive against 62% of WorldClass PC's.
duck ships an update every 6 weeks, WorldClass PC fortnightly. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.
| Parameter | duck | WorldClass PC |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (12 ratings) — better | 4.2 (6 ratings) |
| Positive reviews | 98.3% of reviews — better | 62.3% of reviews |
| Number of ratings | 12 — better | 6 |
| Update frequency | Every 6 weeks | Fortnightly — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | Ad-supported |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 16.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 54 MB | 73 MB |
| Age rating | 4+ | 4+ |
| Developer | SEUNGHWAN LEE | Bigpicture Interactive Co.,Ltd. |
Customer experience
duck
WorldClass PC
In-app purchases
duck
No in-app purchases
WorldClass PC
No in-app purchases
