# Houji vs Unit Convert Master

The clearest difference is price: Unit Convert Master at Free against Houji's $1.99. Houji's advantage is ads (none vs shown) and iOS requirement (16.1 vs 18.2). On update cadence, in-app purchases and device support there is nothing between them.

Unit Convert Master is free to download; Houji costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Houji ships an update every 7 months, Unit Convert Master every 4 months. The most recent releases landed on September 22, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Houji | Unit Convert Master |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/unit-convert-master/id6743671551/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 4 months** |
| Monetization | — | Ad-supported |
| Size | 4 MB | 4 MB |
| Requires iOS | **16.1** | 18.2 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [her0.jp](https://appshunter.io/developer/482918302) | [Mizuki Hoshida](https://appshunter.io/developer/1797942917) |

## What reviewers say

### Houji

[App page](https://appshunter.io/ios/app/houji/id482918299)

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

**In-app purchases:** none


### Unit Convert Master

[App page](https://appshunter.io/ios/app/unit-convert-master/id6743671551)

Easily convert between over 100 measurement units across 15 categories. This app offers a user-friendly interface, offline functionality, and a history of your conversions for quick access. Ideal for students, professionals, and everyday users needing precise calculations.

**Highlights:** 15+ conversion categories, 100+ measurement units, Intuitive interface with themes, Custom keyboard for input, Conversion history with search, Offline functionality

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

**In-app purchases:** none


## Frequently asked questions

### Is Houji free?

Houji costs $1.99, with no in-app purchases.

### Is Unit Convert Master free?

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

### Do Houji or Unit Convert Master have ads?

Unit Convert Master shows ads; Houji does not.

### Which is updated more often, Houji or Unit Convert Master?

Houji ships an update every 7 months, and Unit Convert Master every 4 months. Most recently, Houji was updated on September 22, 2026 and Unit Convert Master on September 13, 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.*