# HP vs my12c

The clearest difference is in-app purchases: HP at none against my12c's 1. HP also leads on iOS requirement (17.2 vs 26.0). my12c's advantage is update cadence (every 5 days vs every 11 days) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. my12c sells 1 one-off in-app purchase. HP asks for nothing beyond the download.

HP ships an update every 11 days, my12c every 5 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | HP | my12c |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (58 ratings)](https://appshunter.io/ios/app/hp-35/id6738010641/reviews)** | — |
| Number of ratings | **58** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 days | **Every 5 days** |
| Monetization | Free | — |
| Size | 2 MB | 6 MB |
| Requires iOS | **17.2** | 26.0 |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Enrique Haro](https://appshunter.io/developer/1778874870) | [Miroslav Perovic](https://appshunter.io/developer/400748424) |

## What reviewers say

### 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


### my12c

[App page](https://appshunter.io/ios/app/my12c/id6814496960)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Full App | $9.99 | one-time |


## Frequently asked questions

### Is HP free?

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

### Is my12c free?

my12c is free to download, with in-app purchases available.

### Do HP or my12c have ads?

Neither HP nor my12c shows ads.

### Which is updated more often, HP or my12c?

HP ships an update every 11 days, and my12c every 5 days. Most recently, HP was updated on October 24, 2026 and my12c on October 24, 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.*