# Calculus vs 悦学云

The clearest difference is in-app purchases: 悦学云 at none against Calculus's 4. Calculus's advantage is update cadence (every 3 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Calculus sells 4 in-app purchases, starting at $1.99 per month. 悦学云 asks for nothing beyond the download.

Calculus ships an update every 3 days, 悦学云 every 3 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | Calculus | 悦学云 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/calculus-learn-and-practice/id6758305500/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 3 weeks |
| Size | 109 MB | 6 MB |
| Requires iOS | **17.6** | 18.6 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [光浩 李](https://appshunter.io/developer/1576352133) | [北京宜天美科技有限公司](https://appshunter.io/developer/1838651464) |

## What reviewers say

### Calculus

[App page](https://appshunter.io/ios/app/calculus-learn-and-practice/id6758305500)

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calculus Pro Monthly | $1.99 | per month |
| Calculus Pro Yearly | $9.99 | per year |
| Unlock All Chapters | $9.99 | one-time |
| Calculus Pro Lifetime | $19.99 | one-time |


### 悦学云

[App page](https://appshunter.io/ios/app/id6768720871)

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

**In-app purchases:** none


## Frequently asked questions

### Is Calculus free?

Calculus is free to download, with in-app purchases available.

### Is 悦学云 free?

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

### Do Calculus or 悦学云 have ads?

Neither Calculus nor 悦学云 shows ads.

### Which is updated more often, Calculus or 悦学云?

Calculus ships an update every 3 days, and 悦学云 every 3 weeks. Most recently, Calculus was updated on October 25, 2026 and 悦学云 on October 25, 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.*