# US Unit Converter vs US Units Guide

The clearest difference is ads: US Units Guide at none against US Unit Converter's shown. US Units Guide also leads on update cadence (monthly vs every 6 months). US Unit Converter's advantage is iOS requirement (15.6 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. US Unit Converter sells 1 one-off in-app purchase and US Units Guide sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

US Unit Converter ships an update every 6 months, US Units Guide monthly. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | US Unit Converter | US Units Guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (110 ratings)](https://appshunter.io/ios/app/us-unit-converter/id1577905442/reviews)** | — |
| Number of ratings | **110** | — |
| Positive reviews | 44.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 3 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kei Suefuji](https://appshunter.io/developer/1388335881) | [BOTONG BAO](https://appshunter.io/developer/1896543904) |

## What reviewers say

### US Unit Converter

[App page](https://appshunter.io/ios/app/us-unit-converter/id1577905442)

Easily convert between US customary units and the International System of Units for various measurements like length, weight, area, volume, and temperature. Access conversion history and remove ads with a premium upgrade.

**Highlights:** Length conversion, Weight conversion, Area conversion, Liquid volume conversion, Temperature conversion, Conversion history, Ad-free option

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PREMIUM | $3.99 | one-time |


### US Units Guide

[App page](https://appshunter.io/ios/app/us-units-guide-unit-converter/id6784946304)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Found it useful | $0.99 | one-time |
| Support maintenance | $2.99 | one-time |
| Keep it going | $4.99 | one-time |


## Frequently asked questions

### Is US Unit Converter free?

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

### Is US Units Guide free?

US Units Guide is free to download, with in-app purchases available.

### Do US Unit Converter or US Units Guide have ads?

US Unit Converter shows ads; US Units Guide does not.

### Which is updated more often, US Unit Converter or US Units Guide?

US Unit Converter ships an update every 6 months, and US Units Guide monthly. Most recently, US Unit Converter was updated on November 7, 2026 and US Units Guide on October 31, 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.*