# HP16C vs Hz Lab

The clearest difference is in-app purchases: HP16C at none against Hz Lab's 1. HP16C also leads on update cadence (weekly vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

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

HP16C ships an update weekly, Hz Lab every 2 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | HP16C | Hz Lab |
| --- | --- | --- |
| 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 2 weeks |
| Monetization | Free | — |
| Size | 1 MB | 2 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Michael Doornbos](https://appshunter.io/developer/1891405652) | [Daishi Sugawara](https://appshunter.io/developer/6783803841) |

## 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


### Hz Lab

[App page](https://appshunter.io/ios/app/hz-lab-frequency-generator/id6802062892)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hz Lab Pro | $1.99 | one-time |


## Frequently asked questions

### Is HP16C free?

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

### Is Hz Lab free?

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

### Do HP16C or Hz Lab have ads?

Neither HP16C nor Hz Lab shows ads.

### Which is updated more often, HP16C or Hz Lab?

HP16C ships an update weekly, and Hz Lab every 2 weeks. Most recently, HP16C was updated on October 24, 2026 and Hz Lab 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.*