# Math Orbs vs 零鴨蛋

The clearest difference is price: 零鴨蛋 at Free against Math Orbs's $0.99. Math Orbs's advantage is iOS requirement (13.0 vs 15.5). On update cadence, ads, in-app purchases and device support there is nothing between them.

零鴨蛋 is free to download; Math Orbs costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Math Orbs ships an update weekly, 零鴨蛋 fortnightly. The most recent releases landed on August 1, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Math Orbs | 零鴨蛋 |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/math-orbs/id6475911131/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Fortnightly |
| Monetization | Paid | — |
| Size | 72 MB | 191 MB |
| Requires iOS | **13.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Knowledge Vortex, LLC](https://appshunter.io/developer/1725396723) | [wei ming chen](https://appshunter.io/developer/568881778) |

## What reviewers say

### Math Orbs

[App page](https://appshunter.io/ios/app/math-orbs/id6475911131)

This app offers Grade 1-6 algebra practice for children, allowing parents to track progress and identify areas of difficulty. It features interactive quests, collectible orbs, and a virtual scratchpad for calculations, making learning engaging and eliminating the need for workbooks.

**Highlights:** Grade 1-6 algebra practice, Parental progress tracking, Identify areas of struggle, Interactive quests, Collectible orbs, Virtual scratchpad

**Features:** Vision Pro support

**In-app purchases:** none


### 零鴨蛋

[App page](https://appshunter.io/ios/app/id6763559099)

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

**In-app purchases:** none


## Frequently asked questions

### Is Math Orbs free?

Math Orbs costs $0.99, with no in-app purchases.

### Is 零鴨蛋 free?

零鴨蛋 is free to download, with no in-app purchases.

### Do Math Orbs or 零鴨蛋 have ads?

Neither Math Orbs nor 零鴨蛋 shows ads.

### Which is updated more often, Math Orbs or 零鴨蛋?

Math Orbs ships an update weekly, and 零鴨蛋 fortnightly. Most recently, Math Orbs was updated on August 1, 2026 and 零鴨蛋 on September 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.*