# DIY Units Conversion vs Unit Conversion Calculator $

The clearest difference is ads: DIY Units Conversion at none against Unit Conversion Calculator $'s shown. Unit Conversion Calculator $'s advantage is update cadence (every 9 months vs every 25 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

DIY Units Conversion ships an update every 25 months, Unit Conversion Calculator $ every 9 months. The most recent releases landed on September 8, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | DIY Units Conversion | Unit Conversion Calculator $ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/diy-units-conversion/id6475029001/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 25 months | **Every 9 months** |
| Monetization | Free | — |
| Size | 31 MB | 28 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [DingXin Cheng](https://appshunter.io/developer/1645815345) | [JanoGroup LLC](https://appshunter.io/developer/1781461557) |

## What reviewers say

### DIY Units Conversion

[App page](https://appshunter.io/ios/app/diy-units-conversion/id6475029001)

Create your own personalized unit conversion library by adding, removing, and reordering conversions. Tailor the app to your specific needs, focusing on the units you use most frequently.

**Highlights:** Customizable conversion library, Add, remove, and reorder units, Supports various scientific fields, User-defined conversion sets

**Features:** macOS Compatibility

**In-app purchases:** none


### Unit Conversion Calculator $

[App page](https://appshunter.io/ios/app/unit-conversion-calculator/id6742060456)

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

**In-app purchases:** none


## Frequently asked questions

### Is DIY Units Conversion free?

DIY Units Conversion is free to download, with no in-app purchases.

### Is Unit Conversion Calculator $ free?

Unit Conversion Calculator $ is free to download, with no in-app purchases.

### Do DIY Units Conversion or Unit Conversion Calculator $ have ads?

Unit Conversion Calculator $ shows ads; DIY Units Conversion does not.

### Which is updated more often, DIY Units Conversion or Unit Conversion Calculator $?

DIY Units Conversion ships an update every 25 months, and Unit Conversion Calculator $ every 9 months. Most recently, DIY Units Conversion was updated on September 8, 2026 and Unit Conversion Calculator $ on October 12, 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.*