# WFワットチェッカー vs FlashDrop

The clearest difference is in-app purchases: WFワットチェッカー at none against FlashDrop's 2. WFワットチェッカー also leads on ads (none vs shown). FlashDrop's advantage is update cadence (every 10 days vs every 2 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. FlashDrop sells 2 in-app purchases, starting at $1.99 per month. WFワットチェッカー asks for nothing beyond the download.

WFワットチェッカー ships an update every 2 months, FlashDrop every 10 days. The most recent releases landed on October 26, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | WFワットチェッカー | FlashDrop |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 11.1% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 10 days** |
| Monetization | Free | — |
| Size | 25 MB | 50 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RATOC Systems, Inc.](https://appshunter.io/developer/568725272) | [ButterFalcon](https://appshunter.io/developer/1795929957) |

## 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


### FlashDrop

[App page](https://appshunter.io/ios/app/flashdrop-file-sharing/id6753886537)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Annual | $17.99 | per year |


## 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 FlashDrop free?

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

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

FlashDrop 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 FlashDrop?

WFワットチェッカー ships an update every 2 months, and FlashDrop every 10 days. Most recently, WFワットチェッカー was updated on October 26, 2026 and FlashDrop on October 5, 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.*