# Camera Exposure Calculator Pro vs HP

The clearest difference is price: HP at Free against Camera Exposure Calculator Pro's $3.99. HP also leads on update cadence (every 11 days vs every 54 months). Camera Exposure Calculator Pro's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.2). On ads and in-app purchases there is nothing between them.

HP is free to download; Camera Exposure Calculator Pro costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Camera Exposure Calculator Pro ships an update every 54 months, HP every 11 days. Both last shipped on October 30, 2026.

## The numbers

| Metric | Camera Exposure Calculator Pro | HP |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | — | **[4.6 (62 ratings)](https://appshunter.io/ios/app/hp-35/id6738010641/reviews)** |
| Number of ratings | — | **62** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 54 months | **Every 11 days** |
| Monetization | — | Free |
| Size | 21 MB | 2 MB |
| Requires iOS | **13.0** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Ajay Gorasiya](https://appshunter.io/developer/1455174866) | [Enrique Haro](https://appshunter.io/developer/1778874870) |

## What reviewers say

### Camera Exposure Calculator Pro

[App page](https://appshunter.io/ios/app/camera-exposure-calculator-pro/id1603970223)

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

**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 Camera Exposure Calculator Pro free?

Camera Exposure Calculator Pro costs $3.99, with no in-app purchases.

### Is HP free?

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

### Do Camera Exposure Calculator Pro or HP have ads?

Neither Camera Exposure Calculator Pro nor HP shows ads.

### Which is updated more often, Camera Exposure Calculator Pro or HP?

Camera Exposure Calculator Pro ships an update every 54 months, and HP every 11 days. Most recently, Camera Exposure Calculator Pro was updated on October 30, 2026 and HP on October 30, 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.*