VNPAY vs Zero Sum Scorekeeper Assistant
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
VNPAY
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VNPAY-CA là ứng dụng sử dụng giải pháp ký số từ xa của VNPAY-CA, cho phép tích hợp và sử dụng chữ ký số để xác thực người dùng do Công ty Cổ phần Giải pháp Thanh toán Việt Nam phát triển. VNPAY-CA đảm bảo tiêu chuẩn an toàn bảo mật eIDAS của Châu và các tiêu chuẩn của Bộ Thông tin và Truyền thông. Một số tính năng nổi bật của ứng dụng VNPAY-CA: - Ký số mọi lúc, mọi nơi ngay trên thiết bị di động - Quản lý chứng thư số và giao dịch ký số - Quản lý thiết bị truy cập đăng nhập và yêu cầu ký số. Tải ứng dụng và đăng ký sử dụng dịch vụ Ký số từ xa VNPAY-CA ngay. Hotline: 0829 887 887 Email: supportca@vnpay.vn
Zero Sum Scorekeeper Assistant
This smart scorekeeper uses zero-sum scoring theory to automatically calculate and fill in the last player's score. It offers AI-powered support for multiple Vietnamese card games, handling complex rules and scoring logic.
- AI-assisted scoring for Vietnamese card games
- Automatic score calculation
- Supports unlimited players, matches, and games
- Dead-simple, distraction-free game flow
- Checksum validation for accuracy
- Player ranking
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Built on zero-sum scoring theory, this smart scorekeeper helps you enter scores faster by automatically calculating and filling in the last player’s score. The app also includes AI-powered support for multiple Vietnamese card games, handling game-specific rules and scoring logic for you. Key features: AI-assisted scoring for popular Vietnamese card games Automatic score distribution with the minimum number of transactions Dead-simple, distraction-free game flows Unlimited players, matches, and games Checksum validation for each match and the entire game Player ranking per match and overall And much more coming soon
Screenshots
Verdict
The clearest difference is update cadence: Zero Sum Scorekeeper Assistant at every 4 weeks against VNPAY's every 2 months. VNPAY's advantage is 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. Neither carries in-app purchases, so what you see is what you pay.
VNPAY ships an update every 2 months, Zero Sum Scorekeeper Assistant every 4 weeks. The most recent releases landed on October 15, 2026 and October 10, 2026 respectively.
| Parameter | VNPAY | Zero Sum Scorekeeper Assistant |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 95.2% of reviews |
| Update frequency | Every 2 months | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 110 MB | 52 MB |
| Age rating | 17+ | 4+ |
| Developer | VNPAY | Duong Vu Tung |
In-app purchases
VNPAY
No in-app purchases
Zero Sum Scorekeeper Assistant
No in-app purchases
Questions
Is VNPAY free?
Is Zero Sum Scorekeeper Assistant free?
Do VNPAY or Zero Sum Scorekeeper Assistant have ads?
Which is updated more often, VNPAY or Zero Sum Scorekeeper Assistant?
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