# Calculator HD+ Pro vs Astreon Manager

The clearest difference is price: Astreon Manager at Free against Calculator HD+ Pro's $3.99. Calculator HD+ Pro's advantage is update cadence (every 3 weeks vs every 2 months) and device support (4 vs 2). On ads and in-app purchases there is nothing between them.

Astreon Manager is free to download; Calculator HD+ Pro costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Calculator HD+ Pro ships an update every 3 weeks, Astreon Manager every 2 months. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Calculator HD+ Pro | Astreon Manager |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[4.8 (99 ratings)](https://appshunter.io/ios/app/calculator-hd-plus-pro/id465810912/reviews)** | — |
| Number of ratings | **99** | — |
| Positive reviews | 89.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Freemium | — |
| Size | 31 MB | 121 MB |
| Requires iOS | **10.0** | 16.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [smalltech sarl](https://appshunter.io/developer/289934568) | [Astreon Inc](https://appshunter.io/developer/1524027781) |

## What reviewers say

### Calculator HD+ Pro

[App page](https://appshunter.io/ios/app/calculator-hd-plus-pro/id465810912)

This app offers a high-precision calculation engine with a user-friendly interface. It allows for real-time formula display, multiple undo options, and workspace switching. Advanced features include persistent history, specialized keypads, and AirPrint compatibility.

**Highlights:** High precision engine, Result displayed while typing, Multiple undo, Switch between workspaces, Persistent history, Specialized keypad, AirPrint support

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Intuitive and easy to use
- 🚀 Efficient and fast calculations
- 💡 Helpful calculation history and workspaces
- 🎨 Sleek and modern design
- 🔒 Reliable and stable performance

**What reviewers complain about**

- 🐛 Occasional bugs and glitches
- 🔊 Annoying key press sound
- 📱 Needs better optimization for larger screens
- 💰 Paid version not significantly different from free

**Reported bugs**

- Calculation history not always accurate
- Music playback issues when app is opened
- Location permission request not necessary

**Requested features**

- Customizable decimal places
- Memory function
- Conversion tools
- Ability to sync across devices


### Astreon Manager

[App page](https://appshunter.io/ios/app/astreon-manager/id1524820866)

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

**In-app purchases:** none


## Frequently asked questions

### Is Calculator HD+ Pro free?

Calculator HD+ Pro costs $3.99, with no in-app purchases.

### Is Astreon Manager free?

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

### Do Calculator HD+ Pro or Astreon Manager have ads?

Neither Calculator HD+ Pro nor Astreon Manager shows ads.

### Which is updated more often, Calculator HD+ Pro or Astreon Manager?

Calculator HD+ Pro ships an update every 3 weeks, and Astreon Manager every 2 months. Most recently, Calculator HD+ Pro was updated on October 30, 2026 and Astreon Manager on October 25, 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.*