# 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). my15c's advantage is update cadence (every 2 days vs every 8 days). On price, 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 every 8 days, my15c every 2 days. The most recent releases landed on September 21, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | HP16C | my15c |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/hp16c/id6761774728/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 days | **Every 2 days** |
| Monetization | Free | — |
| Size | 1 MB | 53 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

**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 every 8 days, and my15c every 2 days. Most recently, HP16C was updated on September 21, 2026 and my15c on September 14, 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.*