# Math Derivatives vs ChatPDF

Math Derivatives and ChatPDF both sit at 4.5 stars, but that hides the real split: 100% of Math Derivatives's written reviews are positive against 0% of ChatPDF's. Math Derivatives also leads on ads (none vs shown) and iOS requirement (11.3 vs 15.6). ChatPDF's advantage is update cadence (every 4 days vs every 2 months) and ratings volume (92 vs 15). On price, rating, in-app purchases and monetization model there is nothing between them.

Both are free to download. Math Derivatives sells 1 one-off in-app purchase and ChatPDF sells 2 in-app purchases, starting at $14.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.5 for Math Derivatives against 4.6 for ChatPDF. That said, the two scores are not equally well evidenced: ChatPDF has 92 ratings behind it against 15, so its average is the more settled of the two. Written reviews are what separate them: 100% of Math Derivatives's written reviews are positive against 0% of ChatPDF's.

Math Derivatives ships an update every 2 months, ChatPDF every 4 days. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Math Derivatives | ChatPDF |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (15 ratings)](https://appshunter.io/ios/app/math-derivatives/id1435052476/reviews) | **[4.6 (92 ratings)](https://appshunter.io/ios/app/chatpdf-chat-pdf-ai/id6742454061/reviews)** |
| Number of ratings | 15 | **92** |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 13 MB | 41 MB |
| Requires iOS | **11.3** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Electronial](https://appshunter.io/developer/1350247180) | [ChatPDF GmbH](https://appshunter.io/developer/1711436087) |

## What reviewers say

### Math Derivatives

[App page](https://appshunter.io/ios/app/math-derivatives/id1435052476)

Access a comprehensive list of common derivative formulas for various mathematical functions. Easily view derivative rules for basic, exponential, logarithmic, trigonometric, and hyperbolic functions, or display all formulas simultaneously. An upgrade option provides access to even more formulas.

**Highlights:** List of common derivative formulas, Derivative rules for basic functions, Exponential function derivatives, Logarithmic function derivatives, Trigonometric function derivatives, Hyperbolic function derivatives

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro version | $0.99 | one-time |


### ChatPDF

[App page](https://appshunter.io/ios/app/chatpdf-chat-pdf-ai/id6742454061)

This AI-powered tool allows you to ask questions and get summaries directly from your PDF documents. It supports multiple files, OCR, and multilingual interactions, making complex information easily accessible.

**Highlights:** Instant answers from PDFs, Quick document summaries, Chat with multiple PDFs, OCR for scanned documents, Multilingual support, Cross-device access

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plus Subscription | $14.99 | per month |
| ChatPDF Yearly Plus Plan | $89.99 | per year |


## Frequently asked questions

### Is Math Derivatives free?

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

### Is ChatPDF free?

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

### Which has better reviews, Math Derivatives or ChatPDF?

ChatPDF is rated higher. Math Derivatives averages 4.5 out of 5 from 15 ratings, while ChatPDF averages 4.6 from 92 ratings.

### Do Math Derivatives or ChatPDF have ads?

ChatPDF shows ads; Math Derivatives does not.

### Which is updated more often, Math Derivatives or ChatPDF?

Math Derivatives ships an update every 2 months, and ChatPDF every 4 days. Most recently, Math Derivatives was updated on October 26, 2026 and ChatPDF on October 24, 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.*