# 郵便番号検索 vs PrepNote

The clearest difference is in-app purchases: 郵便番号検索 at none against PrepNote's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. PrepNote sells 1 one-off in-app purchase. 郵便番号検索 asks for nothing beyond the download.

郵便番号検索 ships an update every 14 months, PrepNote every 7 months. The most recent releases landed on August 19, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | 郵便番号検索 | PrepNote |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 14 months | **Every 7 months** |
| Monetization | Ad-supported | — |
| Size | 9 MB | 7 MB |
| Requires iOS | 17.6 | **17.5** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [hirokazu murabe](https://appshunter.io/developer/894364772) | [Eri Tominaga](https://appshunter.io/developer/1528527513) |

## What reviewers say

### 郵便番号検索

[App page](https://appshunter.io/ios/app/id1066906601)

Find postal codes from addresses or addresses from postal codes with this free app. It works offline, saving data costs and ensuring usability even in areas with weak or no internet connection.

**Highlights:** Search postal code by address, Search address by postal code, Offline functionality, Free to use, Saves data costs

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

**In-app purchases:** none


### PrepNote

[App page](https://appshunter.io/ios/app/prepnote/id6648762613)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Features | $1.99 | one-time |


## Frequently asked questions

### Is 郵便番号検索 free?

郵便番号検索 is free to download, with no in-app purchases.

### Is PrepNote free?

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

### Do 郵便番号検索 or PrepNote have ads?

Both 郵便番号検索 and PrepNote show ads.

### Which is updated more often, 郵便番号検索 or PrepNote?

郵便番号検索 ships an update every 14 months, and PrepNote every 7 months. Most recently, 郵便番号検索 was updated on August 19, 2026 and PrepNote on September 14, 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.*