# HP16C vs my15c

The clearest difference is in-app purchases: HP16C at none against my15c's 1. HP16C also leads on iOS requirement (17.0 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. my15c sells 1 one-off in-app purchase. HP16C asks for nothing beyond the download.

HP16C ships an update weekly, my15c every 5 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | HP16C | my15c |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (4 ratings)](https://appshunter.io/ios/app/hp16c/id6761774728/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 5 days** |
| Monetization | Free | — |
| Size | 1 MB | 55 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Michael Doornbos](https://appshunter.io/developer/1891405652) | [Miroslav Perovic](https://appshunter.io/developer/400748424) |

## What reviewers say

### HP16C

[App page](https://appshunter.io/ios/app/hp16c/id6761774728)

This app faithfully recreates the legendary HP 16C Computer Scientist calculator, offering advanced hex arithmetic, bit manipulation, and base conversion. It features RPN, keystroke programming, and modern enhancements like a two-line display and haptic feedback.

**Highlights:** Full RPN calculator, Integer arithmetic (HEX, DEC, OCT, BIN), Configurable word size (1-64 bits), Complete bit operations, Keystroke programming, Two-line display, Haptic feedback

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

**In-app purchases:** none


### my15c

[App page](https://appshunter.io/ios/app/my15c/id6796379580)

**Features:** Vision Pro support

**In-app purchases (1)**

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


## Frequently asked questions

### Is HP16C free?

HP16C is free to download, with no in-app purchases.

### Is my15c free?

my15c is free to download, with in-app purchases available.

### Do HP16C or my15c have ads?

Neither HP16C nor my15c shows ads.

### Which is updated more often, HP16C or my15c?

HP16C ships an update weekly, and my15c every 5 days. Most recently, HP16C was updated on October 24, 2026 and my15c 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.*