# PVbutler vs WatchPower

The clearest difference is rating: PVbutler at 2.9 against WatchPower's 2.5. WatchPower's advantage is ratings volume (75 vs 15). On price, review sentiment, update cadence and ads there is nothing between them.

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

PVbutler holds the better App Store score, 2.9 against 2.5. That said, the two scores are not equally well evidenced: WatchPower has 75 ratings behind it against 15, so its average is the more settled of the two. Written reviews split almost evenly too, at 18% and 17% positive.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | PVbutler | WatchPower |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.9 (15 ratings)](https://appshunter.io/ios/app/pvbutler/id1418322399/reviews)** | [2.5 (75 ratings)](https://appshunter.io/ios/app/watchpower/id1487569321/reviews) |
| Number of ratings | 15 | **75** |
| Positive reviews | **17.6% of reviews** | 17.2% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free | Free |
| Size | 214 MB | 22 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Growatt New Energy Technology Co.,Ltd](https://appshunter.io/developer/1135731820) | [祥梯 孟](https://appshunter.io/developer/1070155084) |

## What reviewers say

### PVbutler

[App page](https://appshunter.io/ios/app/pvbutler/id1418322399)

Monitor your photovoltaic plant's performance remotely. Access energy yield, income, and system status wirelessly. Requires registration with the Sacolar PV Data Center.

**Highlights:** Remote monitoring of photovoltaic plants, Access energy yield data, Track income generation, View system status, Wireless data access, Compatible with Sacolar PV Data Center

**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 PVbutler free?

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

### Is WatchPower free?

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

### Which has better reviews, PVbutler or WatchPower?

PVbutler is rated higher. PVbutler averages 2.9 out of 5 from 15 ratings, while WatchPower averages 2.5 from 75 ratings.

### Do PVbutler or WatchPower have ads?

Neither PVbutler nor WatchPower shows ads.

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

PVbutler ships an update every 3 months, and WatchPower every 3 months. Most recently, PVbutler was updated on November 2, 2026 and WatchPower on November 3, 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.*