# 正修微積分 vs Calculus Formulas

The clearest difference is in-app purchases: 正修微積分 at none against Calculus Formulas's 3. 正修微積分 also leads on iOS requirement (6.0 vs 15.1). Calculus Formulas's advantage is device support. On price there is nothing between them.

Both are free to download. Calculus Formulas sells 3 in-app purchases, starting at $4.99 per 7 days. 正修微積分 asks for nothing beyond the download.

## The numbers

| Metric | 正修微積分 | Calculus Formulas |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id535402014/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Size | 29 MB | 48 MB |
| Requires iOS | **6.0** | 15.1 |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nusoft](https://appshunter.io/developer/512462493) | [Mobin Akhter](https://appshunter.io/developer/1812505286) |

## What reviewers say

### 正修微積分

[App page](https://appshunter.io/ios/app/id535402014)

**In-app purchases:** none


### Calculus Formulas

[App page](https://appshunter.io/ios/app/calculus-formulas-calcref/id6761394165)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $4.99 | per 7 days |
| CalcRef Yearly Premium | $44.99 | per year |
| CalcRef Premium Lifetime | $74.99 | one-time |


## Frequently asked questions

### Is 正修微積分 free?

正修微積分 is free to download, with no in-app purchases.

### Is Calculus Formulas free?

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

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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.*