# Calculator HD Pro vs Pison EXPLORE

The clearest difference is price: Pison EXPLORE at Free against Calculator HD Pro's $9.99. Pison EXPLORE also leads on in-app purchases (none vs 2) and update cadence (every 2 weeks vs every 2 months). Calculator HD Pro's advantage is ratings volume (11K vs 1). On ads, device support and iOS requirement there is nothing between them.

Pison EXPLORE is free to download; Calculator HD Pro costs $9.99 up front. Calculator HD Pro sells 2 one-off in-app purchases. Pison EXPLORE asks for nothing beyond the download.

Pison EXPLORE holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Calculator HD Pro has 11K ratings behind it against 1, so its average is the more settled of the two.

Calculator HD Pro ships an update every 2 months, Pison EXPLORE every 2 weeks. The most recent releases landed on October 17, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Calculator HD Pro | Pison EXPLORE |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [4.8 (11K ratings)](https://appshunter.io/ios/app/calculator-hd-pro/id565023649/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pison-explore/id6469170691/reviews)** |
| Number of ratings | **11K** | 1 |
| Positive reviews | 94.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 48 MB | 88 MB |
| Requires iOS | 15.2 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cider Software LLC](https://appshunter.io/developer/465180756) | [Pison Technology](https://appshunter.io/developer/1705268860) |

## What reviewers say

### Calculator HD Pro

[App page](https://appshunter.io/ios/app/calculator-hd-pro/id565023649)

This app offers a powerful and customizable calculator experience with a dual-line display for seeing input and results simultaneously. Save and organize your calculations with history, labeling, and email options. Personalize layouts, themes, and fonts for a comfortable and efficient user experience.

**Highlights:** Dual-line display, Multi-line input, Calculation history, Customizable layouts and themes, Full scientific functions, Left-handed mode, VoiceOver accessibility

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Widget | $1.99 | one-time |
| Multiple History Tapes | $1.99 | one-time |

**What reviewers like**

- 🚀 Significantly better than Apple's calculator
- 👍 Excellent app with great features
- 👍 Flawless app, very useful
- 👍 Fantastic calculator, meets all needs
- 👍 Best calculator app, highly recommended

**What reviewers complain about**

- 🐛 Bothersome pop-up review requests
- 🐛 Cannot delete lists in history tapes
- 🐛 Repeated rate and review pop-ups

**Reported bugs**

- Cannot delete lists in history tapes
- Ads still appear after purchasing full version

**Requested features**

- Add binary, decimal, and hex conversion
- Ability to manually sort result lines
- Add a tax calculation button


### Pison EXPLORE

[App page](https://appshunter.io/ios/app/pison-explore/id6469170691)

This companion app for a wearable device allows users to explore various sensor data. It offers built-in protocols to measure reaction time, decision-making speed, and concentration. Unlock your potential by getting the most out of your Pison device.

**Highlights:** Measure reaction time, Assess decision-making speed, Track concentration ability, Companion app for Pison wearable, Built-in exploration protocols

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

**In-app purchases:** none


## Frequently asked questions

### Is Calculator HD Pro free?

Calculator HD Pro costs $9.99, and also offers in-app purchases.

### Is Pison EXPLORE free?

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

### Which has better reviews, Calculator HD Pro or Pison EXPLORE?

Pison EXPLORE is rated higher. Calculator HD Pro averages 4.8 out of 5 from 11K ratings, while Pison EXPLORE averages 5.0 from 1 ratings.

### Do Calculator HD Pro or Pison EXPLORE have ads?

Neither Calculator HD Pro nor Pison EXPLORE shows ads.

### Which is updated more often, Calculator HD Pro or Pison EXPLORE?

Calculator HD Pro ships an update every 2 months, and Pison EXPLORE every 2 weeks. Most recently, Calculator HD Pro was updated on October 17, 2026 and Pison EXPLORE 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.*