# Unit Converter HD. vs Any Formula

The clearest difference is ads: Any Formula at none against Unit Converter HD.'s shown. Any Formula also leads on rating (5.0 vs 4.7). Unit Converter HD.'s advantage is ratings volume (644 vs 2) and iOS requirement (13.0 vs 18.0). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. Unit Converter HD. sells 1 one-off in-app purchase and Any Formula sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Any Formula holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Unit Converter HD. has 644 ratings behind it against 2, so its average is the more settled of the two.

Unit Converter HD. ships an update every 2 months, Any Formula monthly. The most recent releases landed on October 20, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Unit Converter HD. | Any Formula |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (644 ratings)](https://appshunter.io/ios/app/unit-converter-hd/id481973377/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/any-formula/id6761690225/reviews)** |
| Number of ratings | **644** | 2 |
| Positive reviews | 93.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 86 MB | 3 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [良峰 侯](https://appshunter.io/developer/654444245) | [Aihotey LLC](https://appshunter.io/developer/1890912802) |

## What reviewers say

### Unit Converter HD.

[App page](https://appshunter.io/ios/app/unit-converter-hd/id481973377)

Easily convert over 700 units across 30 categories with this powerful tool. It offers a user-friendly interface, dark mode support, and a backspace key for quick corrections. Save time on all your measurement conversion needs.

**Highlights:** 700+ Units of Measure, 30 Conversion Categories, Easy-to-Use Interface, Dark Mode Support, Backspace Key

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads Pack | $1.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Handy and convenient
- 💡 Comprehensive set of conversions
- 🚀 Very useful app
- 👍 Intuitive design

**What reviewers complain about**

- 🐛 Occasional crashes or freezing issues
- 💡 Could be more intuitive for some users
- 🔒 Requires horizontal orientation

**Reported bugs**

- Freezing or crashing on some devices
- Display issues with certain units

**Requested features**

- Add support for US weights (tons, lbs., oz.)
- Implement portrait mode support
- Provide more customization options


### Any Formula

[App page](https://appshunter.io/ios/app/any-formula/id6761690225)

Access a vast library of scientific, engineering, and financial formulas for instant calculations. Features smart input validation, customizable themes, and privacy-focused data handling. Unlock all formulas and advanced sharing options with a one-time purchase.

**Highlights:** 572 scientific, engineering, financial formulas, 9 formula categories, Smart input validation, Customizable themes (Light, Dark, Auto), Favorites and history, Unit customization and auto-conversion, Privacy-focused, no tracking

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Any Formula Pro | $2.99 | one-time |


## Frequently asked questions

### Is Unit Converter HD. free?

Unit Converter HD. is free to download, with in-app purchases available.

### Is Any Formula free?

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

### Which has better reviews, Unit Converter HD. or Any Formula?

Any Formula is rated higher. Unit Converter HD. averages 4.7 out of 5 from 644 ratings, while Any Formula averages 5.0 from 2 ratings.

### Do Unit Converter HD. or Any Formula have ads?

Unit Converter HD. shows ads; Any Formula does not.

### Which is updated more often, Unit Converter HD. or Any Formula?

Unit Converter HD. ships an update every 2 months, and Any Formula monthly. Most recently, Unit Converter HD. was updated on October 20, 2026 and Any Formula on October 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.*