# Unit converter vs Precision Metric

The clearest difference is in-app purchases: Unit converter at none against Precision Metric's 1. Unit converter also leads on device support. Precision Metric's advantage is update cadence (every 3 days vs every 3 months). On price and iOS requirement there is nothing between them.

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

Unit converter ships an update every 3 months, Precision Metric every 3 days. The most recent releases landed on October 31, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Unit converter | Precision Metric |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | — |
| Update frequency | Every 3 months | **Every 3 days** |
| Size | 41 MB | 45 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | **iPhone, iPad** | — |
| Age rating | 4+ | 4+ |
| Developer | [Claudio Fusillo](https://appshunter.io/developer/1520006843) | [Eastchester Group Ltd](https://appshunter.io/developer/1884897490) |

## What reviewers say

### Unit converter

[App page](https://appshunter.io/ios/app/unit-converter-unitflow/id6760021792)

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

**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 Unit converter free?

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

### Is Precision Metric free?

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

### Which is updated more often, Unit converter or Precision Metric?

Unit converter ships an update every 3 months, and Precision Metric every 3 days. Most recently, Unit converter was updated on October 31, 2026 and Precision Metric on October 25, 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.*