# Units Conversion Chart vs Precision Metric

The clearest difference is in-app purchases: Units Conversion Chart at none against Precision Metric's 1. Units Conversion Chart also leads on device support. Precision Metric's advantage is iOS requirement (15.1 vs 18.0). On price there is nothing between them.

Both are free to download. Precision Metric sells 1 one-off in-app purchase. Units Conversion Chart asks for nothing beyond the download.

## The numbers

| Metric | Units Conversion Chart | Precision Metric |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | — |
| Update frequency | — | Every 3 days |
| Size | 1 MB | 45 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | **iPhone, iPad** | — |
| Age rating | 4+ | 4+ |
| Developer | [Vishwam B](https://appshunter.io/developer/1068325932) | [Eastchester Group Ltd](https://appshunter.io/developer/1884897490) |

## What reviewers say

### Units Conversion Chart

[App page](https://appshunter.io/ios/app/units-conversion-chart/id6752585107)

**In-app purchases:** none


### Precision Metric

[App page](https://appshunter.io/ios/app/precision-metric-converter/id6761073914)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Precision Metric Pro | $4.99 | one-time |


## Frequently asked questions

### Is Units Conversion Chart free?

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

### Is Precision Metric free?

Precision Metric is free to download, with in-app purchases available.

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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.*