# WFワットチェッカー vs Barcode Detection

The clearest difference is ads: WFワットチェッカー at none against Barcode Detection's shown. WFワットチェッカー also leads on device support (3 vs 1) and iOS requirement (12.0 vs 17.7.2). Barcode Detection's advantage is update cadence (fortnightly vs every 2 months). 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.

WFワットチェッカー ships an update every 2 months, Barcode Detection fortnightly. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | WFワットチェッカー | Barcode Detection |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 11.1% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 25 MB | 35 MB |
| Requires iOS | **12.0** | 17.7.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [RATOC Systems, Inc.](https://appshunter.io/developer/568725272) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### WFワットチェッカー

[App page](https://appshunter.io/ios/app/wf/id1490361450)

Monitor your home's electricity consumption in real-time via your smartphone. Track power usage, voltage, and current, with options to view historical data in graphs and export it to CSV. Remotely control power to connected devices.

**Highlights:** Real-time power consumption display, Convert usage to electricity cost and CO2 emissions, Graph historical usage (hourly, daily, monthly), Export measurement data to CSV, Remote power ON/OFF control

**Features:** macOS Compatibility

**In-app purchases:** none


### Barcode Detection

[App page](https://appshunter.io/ios/app/barcode-detection/id6511215853)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is WFワットチェッカー free?

WFワットチェッカー is free to download, with no in-app purchases.

### Is Barcode Detection free?

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

### Do WFワットチェッカー or Barcode Detection have ads?

Barcode Detection shows ads; WFワットチェッカー does not.

### Which is updated more often, WFワットチェッカー or Barcode Detection?

WFワットチェッカー ships an update every 2 months, and Barcode Detection fortnightly. Most recently, WFワットチェッカー was updated on November 3, 2026 and Barcode Detection on November 8, 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.*