# US Unit Converter vs IDEP

The clearest difference is in-app purchases: IDEP at none against US Unit Converter's 1. IDEP also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. US Unit Converter sells 1 one-off in-app purchase. IDEP asks for nothing beyond the download.

US Unit Converter ships an update every 6 months, IDEP every 12 months. The most recent releases landed on October 18, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | US Unit Converter | IDEP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (109 ratings)](https://appshunter.io/ios/app/us-unit-converter/id1577905442/reviews)** | — |
| Number of ratings | **109** | — |
| Positive reviews | 44.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 6 months** | Every 12 months |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 47 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kei Suefuji](https://appshunter.io/developer/1388335881) | [帅 王](https://appshunter.io/developer/1740124116) |

## 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 |


### IDEP

[App page](https://appshunter.io/ios/app/idep/id6483617348)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is US Unit Converter free?

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

### Is IDEP free?

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

### Do US Unit Converter or IDEP have ads?

US Unit Converter shows ads; IDEP does not.

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

US Unit Converter ships an update every 6 months, and IDEP every 12 months. Most recently, US Unit Converter was updated on October 18, 2026 and IDEP on October 3, 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.*