# Halcyon Calc vs WispPGP

The clearest difference is rating: Halcyon Calc at 4.9 against WispPGP's 4.3. Halcyon Calc also leads on review sentiment (100% vs 75%) and ratings volume (18 vs 3). WispPGP's advantage is update cadence (every 2 weeks vs every 4 months) and price ($3.99 vs $4.99). On ads, in-app purchases, monetization model and device support there is nothing between them.

Halcyon Calc costs $4.99 and WispPGP $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Halcyon Calc holds the better App Store score, 4.9 against 4.3. That said, the two scores are not equally well evidenced: Halcyon Calc has 18 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 100% of Halcyon Calc's written reviews are positive against 75% of WispPGP's.

Halcyon Calc ships an update every 4 months, WispPGP every 2 weeks. The most recent releases landed on October 9, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Halcyon Calc | WispPGP |
| --- | --- | --- |
| Price | $4.99 | **$3.99** |
| Rating | **[4.9 (18 ratings)](https://appshunter.io/ios/app/halcyon-calc/id327064659/reviews)** | [4.3 (3 ratings)](https://appshunter.io/ios/app/wisppgp/id6757249850/reviews) |
| Number of ratings | **18** | 3 |
| Positive reviews | **100.0% of reviews** | 75.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | Paid | Paid |
| Size | 10 MB | 17 MB |
| Requires iOS | 16.6 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Halcyon Touch Software](https://appshunter.io/developer/327064662) | [Marco Janssen](https://appshunter.io/developer/787863348) |

## What reviewers say

### Halcyon Calc

[App page](https://appshunter.io/ios/app/halcyon-calc/id327064659)

A powerful calculator app for students, engineers, and scientists. It handles complex numbers, symbolic expressions, unit conversions, and matrix operations, with advanced plotting and programming capabilities.

**Highlights:** Complex number calculations, Symbolic expression manipulation, Unit conversion with custom units, Matrix and vector operations, Symbolic plotting, Programming of custom operations, Statistical data analysis

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

**In-app purchases:** none


### WispPGP

[App page](https://appshunter.io/ios/app/wisppgp/id6757249850)

This app provides a focused toolkit for encrypting, decrypting, signing, and verifying text using OpenPGP standards. It allows for managing multiple key pairs and integrates with other apps via a share extension for secure communication.

**Highlights:** Encrypt and decrypt messages, Sign and verify messages, Generate and manage multiple key pairs, Set an active key, Share encrypted output as text or files, Use Share Extension for any app

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

**In-app purchases:** none


## Frequently asked questions

### Is Halcyon Calc free?

Halcyon Calc costs $4.99, with no in-app purchases.

### Is WispPGP free?

WispPGP costs $3.99, with no in-app purchases.

### Which has better reviews, Halcyon Calc or WispPGP?

Halcyon Calc is rated higher. Halcyon Calc averages 4.9 out of 5 from 18 ratings, while WispPGP averages 4.3 from 3 ratings.

### Do Halcyon Calc or WispPGP have ads?

Neither Halcyon Calc nor WispPGP shows ads.

### Which is updated more often, Halcyon Calc or WispPGP?

Halcyon Calc ships an update every 4 months, and WispPGP every 2 weeks. Most recently, Halcyon Calc was updated on October 9, 2026 and WispPGP on October 10, 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.*