# Calculator HD Pro for iPad vs OpenHTML

The clearest difference is in-app purchases: Calculator HD Pro for iPad at none against OpenHTML's 1. Calculator HD Pro for iPad also leads on ratings volume (167 vs 4) and review sentiment (86% vs 71%). OpenHTML's advantage is rating (5.0 vs 4.7). On price, ads and device support there is nothing between them.

Both are free to download. OpenHTML sells 1 one-off in-app purchase. Calculator HD Pro for iPad asks for nothing beyond the download.

OpenHTML holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Calculator HD Pro for iPad has 167 ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 86% of Calculator HD Pro for iPad's written reviews are positive against 71% of OpenHTML's, so the app with the better star average is not the one people write more warmly about.

## The numbers

| Metric | Calculator HD Pro for iPad | OpenHTML |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (167 ratings)](https://appshunter.io/ios/app/calculator-hd-pro-for-ipad/id1415030684/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/openhtml-html-pdf-and-markdown/id6776524508/reviews)** |
| Number of ratings | **167** | 4 |
| Positive reviews | **85.7% of reviews** | 71.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 5 days |
| Monetization | **Free** | Free with in-app purchases |
| Size | 13 MB | 20 MB |
| Requires iOS | **9.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [沃林 何](https://appshunter.io/developer/1185353805) | [吉帅 仇](https://appshunter.io/developer/1087837335) |

## What reviewers say

### Calculator HD Pro for iPad

[App page](https://appshunter.io/ios/app/calculator-hd-pro-for-ipad/id1415030684)

This application offers a powerful and user-friendly calculator experience optimized for iPad. It features accurate calculations to eight decimal places, customizable sound effects, and a variety of visual themes.

**Highlights:** Accurate to eight decimal places, Follows order of operations, Customizable sound effects (piano, guitar), Variety of switchable skins, Optimized for iPad

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

**In-app purchases:** none


### OpenHTML

[App page](https://appshunter.io/ios/app/openhtml-html-pdf-and-markdown/id6776524508)

View HTML, Markdown, ZIP web projects, and source files privately on your device. Inspect and export rendered pages offline, diagnose rendering issues, and view code files securely. Designed for developers, students, and anyone needing to inspect web content safely.

**Highlights:** View HTML, Markdown, and source files, Import ZIP archives and web projects, Offline rendering with network access blocked by default, Diagnose rendering and resource issues, Export pages to PDF or long images, Private by default, no accounts or analytics

**Features:** macOS Compatibility, Safari Extension, Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OpenHTML Pro | $2.99 | one-time |


## Frequently asked questions

### Is Calculator HD Pro for iPad free?

Calculator HD Pro for iPad is free to download, with no in-app purchases.

### Is OpenHTML free?

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

### Which has better reviews, Calculator HD Pro for iPad or OpenHTML?

OpenHTML is rated higher. Calculator HD Pro for iPad averages 4.7 out of 5 from 167 ratings, while OpenHTML averages 5.0 from 4 ratings.

### Do Calculator HD Pro for iPad or OpenHTML have ads?

Neither Calculator HD Pro for iPad nor OpenHTML 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.*