# Calccis vs HP

Calccis and HP are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Calccis ships an update every 3 weeks, HP every 11 days. The most recent releases landed on September 12, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Calccis | HP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/hp-35/id6738010641/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 11 days** |
| Monetization | — | Free |
| Size | 1 MB | 2 MB |
| Requires iOS | 17.6 | **17.2** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Jukka Aittola](https://appshunter.io/developer/1676073314) | [Enrique Haro](https://appshunter.io/developer/1778874870) |

## What reviewers say

### Calccis

[App page](https://appshunter.io/ios/app/calccis/id6446233205)

**In-app purchases:** none


### HP

[App page](https://appshunter.io/ios/app/hp-35/id6738010641)

Emulates classic Hewlett Packard RPN scientific calculators from the 1970s. Experience the original HP-35, HP-45, and HP-21 models on your iPhone.

**Highlights:** RPN calculator emulation, HP-35 model, HP-45 model, HP-21 model, Classic scientific calculator interface

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

**In-app purchases:** none


## Frequently asked questions

### Is Calccis free?

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

### Is HP free?

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

### Do Calccis or HP have ads?

Neither Calccis nor HP shows ads.

### Which is updated more often, Calccis or HP?

Calccis ships an update every 3 weeks, and HP every 11 days. Most recently, Calccis was updated on September 12, 2026 and HP on October 8, 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.*