# IAMMETER vs WatchPower

The clearest difference is review sentiment: IAMMETER at 100% against WatchPower's 17%. WatchPower's advantage is iOS requirement (11.0 vs 15.6). On price, update cadence, ads 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.

IAMMETER ships an update every 6 weeks, WatchPower every 3 months. The most recent releases landed on September 10, 2026 and August 31, 2026 respectively.

## The numbers

| Metric | IAMMETER | WatchPower |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.5 (73 ratings)](https://appshunter.io/ios/app/watchpower/id1487569321/reviews)** |
| Number of ratings | — | **73** |
| Positive reviews | **100.0% of reviews** | 17.2% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 3 months |
| Monetization | Free | Free |
| Size | 12 MB | 22 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Beijing Lewei IoT Technologies Co.,Ltd.](https://appshunter.io/developer/877984904) | [祥梯 孟](https://appshunter.io/developer/1070155084) |

## What reviewers say

### IAMMETER

[App page](https://appshunter.io/ios/app/iammeter/id1414075406)

Monitor your home's electricity consumption in real-time. Track energy flow, grid import/export, and solar PV production. Integrate with popular home automation systems.

**Highlights:** Real-time electricity usage tracking, Monitor energy flow, Solar PV system production monitoring, Grid import/export tracking, Home automation integration

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

**In-app purchases:** none


### WatchPower

[App page](https://appshunter.io/ios/app/watchpower/id1487569321)

Monitor off-grid inverters remotely via Wi-Fi. View device status, configure settings, receive alerts for warnings or alarms, and record historical data.

**Highlights:** Monitor inverter status, Configure device settings, Receive warning/alarm notifications, Record device data history, Wi-Fi module integration

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 💻 Useful for monitoring and configuring solar/battery systems
- 🔧 Allows remote configuration of inverter settings
- 🤖 Reliable when it works

**What reviewers complain about**

- 🐛 Frequent connection issues and data delays
- 🕰️ Slow refresh rate and outdated information
- 🤔 Inconsistent and unreliable performance
- 📊 Lack of historical data and graphing features
- 🤯 Difficult setup and registration process

**Reported bugs**

- Devices disappearing from the app
- Incorrect battery capacity and power readings
- Crashes and freezes when trying to access data

**Requested features**

- Add real-time monitoring and updates
- Improve user interface and add more visualizations
- Implement push notifications for important events
- Allow password recovery and account management
- Add support for Bluetooth connectivity


## Frequently asked questions

### Is IAMMETER free?

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

### Is WatchPower free?

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

### Do IAMMETER or WatchPower have ads?

Neither IAMMETER nor WatchPower shows ads.

### Which is updated more often, IAMMETER or WatchPower?

IAMMETER ships an update every 6 weeks, and WatchPower every 3 months. Most recently, IAMMETER was updated on September 10, 2026 and WatchPower on August 31, 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.*