# Deg2Rad vs Derivative

The clearest difference is price: Deg2Rad at Free against Derivative's $1.99. Deg2Rad also leads on iOS requirement (8.0 vs 15.1). Derivative's advantage is update cadence (monthly vs every 18 months). On ads, in-app purchases and device support there is nothing between them.

Deg2Rad is free to download; Derivative costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Deg2Rad ships an update every 18 months, Derivative monthly. The most recent releases landed on October 2, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Deg2Rad | Derivative |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Monthly** |
| Size | 11 MB | 32 MB |
| Requires iOS | **8.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yoshiaki Onishi](https://appshunter.io/developer/852893746) | [Om Prakash Chapagain](https://appshunter.io/developer/1618620262) |

## What reviewers say

### Deg2Rad

[App page](https://appshunter.io/ios/app/deg2rad/id1089828332)

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

**In-app purchases:** none


### Derivative

[App page](https://appshunter.io/ios/app/derivative-calculus-pro/id1618965619)

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

**In-app purchases:** none


## Frequently asked questions

### Is Deg2Rad free?

Deg2Rad is free to download, with no in-app purchases.

### Is Derivative free?

Derivative costs $1.99, with no in-app purchases.

### Do Deg2Rad or Derivative have ads?

Neither Deg2Rad nor Derivative shows ads.

### Which is updated more often, Deg2Rad or Derivative?

Deg2Rad ships an update every 18 months, and Derivative monthly. Most recently, Deg2Rad was updated on October 2, 2026 and Derivative on October 11, 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.*