# K1くんBIG vs Japan NFC Reader

The clearest difference is in-app purchases: K1くんBIG at none against Japan NFC Reader's 2. K1くんBIG also leads on ads (none vs shown) and iOS requirement (10.0 vs 12.0). Japan NFC Reader's advantage is update cadence (every 6 days vs every 15 months) and device support (4 vs 1). On price there is nothing between them.

Both are free to download. Japan NFC Reader sells 2 one-off in-app purchases. K1くんBIG asks for nothing beyond the download.

K1くんBIG ships an update every 15 months, Japan NFC Reader every 6 days. The most recent releases landed on October 13, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | K1くんBIG | Japan NFC Reader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (24 ratings)](https://appshunter.io/ios/app/japan-nfc-reader/id1480265213/reviews)** |
| Number of ratings | — | **24** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 15 months | **Every 6 days** |
| Monetization | — | Free with in-app purchases |
| Size | 2 MB | 48 MB |
| Requires iOS | **10.0** | 12.0 |
| Devices | iPad | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [株式会社アプリラボ](https://appshunter.io/developer/567688645) | [Ryoga Tanaka](https://appshunter.io/developer/1480265212) |

## What reviewers say

### K1くんBIG

[App page](https://appshunter.io/ios/app/k1big/id571889448)

**Features:** macOS Compatibility

**In-app purchases:** none


### Japan NFC Reader

[App page](https://appshunter.io/ios/app/japan-nfc-reader/id1480265213)

Easily check the balance and usage history of various Japanese transit and e-money cards directly on your iPhone. Supports a wide range of IC cards and payment services for convenient financial tracking.

**Highlights:** Check e-money balance, View usage history, Supports Transit IC cards, Supports Rakuten Edy, nanaco, WAON, Supports Hong Kong Octopus card, iPhone compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hide Ads (General) | $1.99 | one-time |
| Hide Ads (Advanced Features) | $4.99 | one-time |


## Frequently asked questions

### Is K1くんBIG free?

K1くんBIG is free to download, with no in-app purchases.

### Is Japan NFC Reader free?

Japan NFC Reader is free to download, with in-app purchases available.

### Do K1くんBIG or Japan NFC Reader have ads?

Japan NFC Reader shows ads; K1くんBIG does not.

### Which is updated more often, K1くんBIG or Japan NFC Reader?

K1くんBIG ships an update every 15 months, and Japan NFC Reader every 6 days. Most recently, K1くんBIG was updated on October 13, 2026 and Japan NFC Reader on October 9, 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.*