# Katchao! vs 靴下のナイガイ公式アプリ

The clearest difference is ads: Katchao! at none against 靴下のナイガイ公式アプリ's shown. Katchao! also leads on update cadence (every 4 days vs every 25 months) and device support (3 vs 1). On price and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Katchao! ships an update every 4 days, 靴下のナイガイ公式アプリ every 25 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Katchao! | 靴下のナイガイ公式アプリ |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 4 days** | Every 25 months |
| Monetization | Free | — |
| Size | 15 MB | 27 MB |
| Requires iOS | **9.0** | 16.1.1 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Duc Tam Trinh](https://appshunter.io/developer/1252200086) | [NAIGAI Co., Ltd](https://appshunter.io/developer/1555193504) |

## What reviewers say

### Katchao!

[App page](https://appshunter.io/ios/app/katchao/id1389699574)

Easily compare prices, reviews, and rankings for products using barcode scanning or keyword searches. Save items to a wishlist and browse popular product rankings. This tool helps you find the best deals and information on desired items.

**Highlights:** Barcode product search, Keyword search for products, Search history tracking, Wishlist functionality, Product ranking browsing, Price comparison

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

**In-app purchases:** none


### 靴下のナイガイ公式アプリ

[App page](https://appshunter.io/ios/app/id1555193502)

**In-app purchases:** none


## Frequently asked questions

### Is Katchao! free?

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

### Is 靴下のナイガイ公式アプリ free?

靴下のナイガイ公式アプリ is free to download, with no in-app purchases.

### Do Katchao! or 靴下のナイガイ公式アプリ have ads?

靴下のナイガイ公式アプリ shows ads; Katchao! does not.

### Which is updated more often, Katchao! or 靴下のナイガイ公式アプリ?

Katchao! ships an update every 4 days, and 靴下のナイガイ公式アプリ every 25 months. Most recently, Katchao! was updated on November 2, 2026 and 靴下のナイガイ公式アプリ on November 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*