# 圣视尔佳弱视训练HD vs Math Orbs

The clearest difference is price: 圣视尔佳弱视训练HD at Free against Math Orbs's $0.99. Math Orbs's advantage is ads (none vs shown) and update cadence (weekly vs every 3 weeks). On in-app purchases, device support and iOS requirement there is nothing between them.

圣视尔佳弱视训练HD is free to download; Math Orbs costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

圣视尔佳弱视训练HD ships an update every 3 weeks, Math Orbs weekly. The most recent releases landed on September 9, 2026 and August 1, 2026 respectively.

## The numbers

| Metric | 圣视尔佳弱视训练HD | Math Orbs |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/math-orbs/id6475911131/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | — | Paid |
| Size | 1.4 GB | 72 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shanghai Kangdeshi Biotechnology Co., Ltd.](https://appshunter.io/developer/1600813148) | [Knowledge Vortex, LLC](https://appshunter.io/developer/1725396723) |

## What reviewers say

### 圣视尔佳弱视训练HD

[App page](https://appshunter.io/ios/app/hd/id1600813146)

**In-app purchases:** none


### 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


## Frequently asked questions

### Is 圣视尔佳弱视训练HD free?

圣视尔佳弱视训练HD is free to download, with no in-app purchases.

### Is Math Orbs free?

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

### Do 圣视尔佳弱视训练HD or Math Orbs have ads?

圣视尔佳弱视训练HD shows ads; Math Orbs does not.

### Which is updated more often, 圣视尔佳弱视训练HD or Math Orbs?

圣视尔佳弱视训练HD ships an update every 3 weeks, and Math Orbs weekly. Most recently, 圣视尔佳弱视训练HD was updated on September 9, 2026 and Math Orbs on August 1, 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.*