# VNPAY vs Zero Sum Scorekeeper Assistant

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.

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.

## The numbers

| Metric | VNPAY | Zero Sum Scorekeeper Assistant |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 95.2% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 weeks** |
| Monetization | — | Free |
| Size | 110 MB | 52 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [VNPAY](https://appshunter.io/developer/443364658) | [Duong Vu Tung](https://appshunter.io/developer/1745934639) |

## What reviewers say

### VNPAY

[App page](https://appshunter.io/ios/app/vnpay-ca/id6446484094)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Zero Sum Scorekeeper Assistant

[App page](https://appshunter.io/ios/app/zero-sum-scorekeeper-assistant/id6502570274)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is VNPAY free?

VNPAY is free to download, with no in-app purchases.

### Is Zero Sum Scorekeeper Assistant free?

Zero Sum Scorekeeper Assistant is free to download, with no in-app purchases.

### Do VNPAY or Zero Sum Scorekeeper Assistant have ads?

Neither VNPAY nor Zero Sum Scorekeeper Assistant shows ads.

### Which is updated more often, VNPAY or Zero Sum Scorekeeper Assistant?

VNPAY ships an update every 2 months, and Zero Sum Scorekeeper Assistant every 4 weeks. Most recently, VNPAY was updated on October 15, 2026 and Zero Sum Scorekeeper Assistant on October 10, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*