# Zero Sum Scorekeeper Assistant vs OnCallCX UC

The clearest difference is update cadence: Zero Sum Scorekeeper Assistant at every 4 weeks against OnCallCX UC's every 11 months. 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.

Zero Sum Scorekeeper Assistant ships an update every 4 weeks, OnCallCX UC every 11 months. The most recent releases landed on October 14, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Zero Sum Scorekeeper Assistant | OnCallCX UC |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 95.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 11 months |
| Monetization | Free | — |
| Size | 52 MB | 110 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Duong Vu Tung](https://appshunter.io/developer/1745934639) | [FTI](https://appshunter.io/developer/1390486719) |

## What reviewers say

### 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


### OnCallCX UC

[App page](https://appshunter.io/ios/app/oncallcx-uc/id6753064133)

**In-app purchases:** none


## Frequently asked questions

### Is Zero Sum Scorekeeper Assistant free?

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

### Is OnCallCX UC free?

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

### Do Zero Sum Scorekeeper Assistant or OnCallCX UC have ads?

Neither Zero Sum Scorekeeper Assistant nor OnCallCX UC shows ads.

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

Zero Sum Scorekeeper Assistant ships an update every 4 weeks, and OnCallCX UC every 11 months. Most recently, Zero Sum Scorekeeper Assistant was updated on October 14, 2026 and OnCallCX UC on October 13, 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.*