# Derive vs Calculus Formulas

The clearest difference is in-app purchases: Derive at none against Calculus Formulas's 3. Calculus Formulas's advantage is iOS requirement (15.1 vs 18.0). On price, ads and device support there is nothing between them.

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

## The numbers

| Metric | Derive | Calculus Formulas |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Size | 14 MB | 48 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Chung Law](https://appshunter.io/developer/1698876420) | [Mobin Akhter](https://appshunter.io/developer/1812505286) |

## What reviewers say

### Derive

[App page](https://appshunter.io/ios/app/derive-a-blitz/id6739738006)

**Features:** macOS Compatibility

**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 Derive free?

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

### Is Calculus Formulas free?

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

### Do Derive or Calculus Formulas have ads?

Neither Derive nor Calculus Formulas shows ads.

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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.*