# PDF Tools vs Math keyboard

The clearest difference is price: PDF Tools at Free against Math keyboard's $0.99. PDF Tools also leads on review sentiment (100% vs 67%) and update cadence (every 6 days vs monthly). Math keyboard's advantage is in-app purchases (none vs 3). On rating, ads, device support and iOS requirement there is nothing between them.

PDF Tools is free to download; Math keyboard costs $0.99 up front. PDF Tools sells 3 in-app purchases, starting at $4.99 per month. Math keyboard asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for PDF Tools against 5.0 for Math keyboard. Both are backed by a comparable volume of ratings — 14 and 4 respectively. Written reviews are what separate them: 100% of PDF Tools's written reviews are positive against 67% of Math keyboard's.

PDF Tools ships an update every 6 days, Math keyboard monthly. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | PDF Tools | Math keyboard |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [5.0 (14 ratings)](https://appshunter.io/ios/app/pdf-tools-editor-and-converter/id6590461166/reviews) | [5.0 (4 ratings)](https://appshunter.io/ios/app/math-keyboard-calcuboard/id6744564198/reviews) |
| Number of ratings | **14** | 4 |
| Positive reviews | **100.0% of reviews** | 66.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 days** | Monthly |
| Monetization | **Freemium** | Paid |
| Size | 36 MB | 3 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Vijay Kale](https://appshunter.io/developer/6799427475) | [Nikolai Rodionov](https://appshunter.io/developer/1123457016) |

## What reviewers say

### PDF Tools

[App page](https://appshunter.io/ios/app/pdf-tools-editor-and-converter/id6590461166)

This app offers a comprehensive suite of tools for managing PDF documents. Easily convert images to PDF, split and merge files, add watermarks, signatures, and compress documents. It provides a user-friendly interface for efficient document handling.

**Highlights:** Split and merge PDF files, Convert images to PDF, Add watermarks and signatures, Compress PDF size, Unlock secured PDFs, Extract and delete pages, Convert PDF to text/image

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (1 month) | $4.99 | per month |
| Premium (1 year) | $14.99 | per year |
| Premium (Lifetime) | $49.99 | one-time |


### Math keyboard

[App page](https://appshunter.io/ios/app/math-keyboard-calcuboard/id6744564198)

Perform calculations directly from your keyboard without switching apps. This smart helper allows quick math while chatting, taking notes, or entering data. It features calculator memory to save and reuse values, enhancing productivity.

**Highlights:** Built-in calculator keyboard, Calculator memory function, No app switching required, Supports basic and advanced operations, Minimalist design for productivity

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

**In-app purchases:** none


## Frequently asked questions

### Is PDF Tools free?

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

### Is Math keyboard free?

Math keyboard costs $0.99, with no in-app purchases.

### Which has better reviews, PDF Tools or Math keyboard?

PDF Tools and Math keyboard are both rated 5.0 out of 5 on the App Store, from 14 and 4 ratings respectively.

### Do PDF Tools or Math keyboard have ads?

Neither PDF Tools nor Math keyboard shows ads.

### Which is updated more often, PDF Tools or Math keyboard?

PDF Tools ships an update every 6 days, and Math keyboard monthly. Most recently, PDF Tools was updated on October 24, 2026 and Math keyboard on October 28, 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.*