# BTワットチェッカー vs カデンタク

The clearest difference is ads: BTワットチェッカー at none against カデンタク's shown. カデンタク's advantage is update cadence (every 3 weeks vs every 3 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

BTワットチェッカー ships an update every 3 months, カデンタク every 3 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | BTワットチェッカー | カデンタク |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 35.7% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 3 MB | 10 MB |
| Requires iOS | **15.6** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [RATOC Systems, Inc.](https://appshunter.io/developer/568725272) | [Sota Shimizu](https://appshunter.io/developer/1873273937) |

## What reviewers say

### BTワットチェッカー

[App page](https://appshunter.io/ios/app/bt/id1490362165)

Monitor and control power consumption with real-time data visualization. Convert energy usage into electricity costs and CO2 emissions, with historical data presented in graphs. Save measurement data to CSV files and remotely manage power ON/OFF.

**Highlights:** Real-time power, current, and voltage display, Convert energy usage to cost and CO2 emissions, Historical data in bar graphs (hourly, daily, monthly, yearly), Save measurement data to CSV, Remote power ON/OFF control

**Features:** macOS Compatibility

**In-app purchases:** none


### カデンタク

[App page](https://appshunter.io/ios/app/id6761651630)

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

**In-app purchases:** none


## Frequently asked questions

### Is BTワットチェッカー free?

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

### Is カデンタク free?

カデンタク is free to download, with no in-app purchases.

### Do BTワットチェッカー or カデンタク have ads?

カデンタク shows ads; BTワットチェッカー does not.

### Which is updated more often, BTワットチェッカー or カデンタク?

BTワットチェッカー ships an update every 3 months, and カデンタク every 3 weeks. Most recently, BTワットチェッカー was updated on October 25, 2026 and カデンタク on October 25, 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.*