# SimplySolar vs WatchPower

The clearest difference is review sentiment: SimplySolar at 80% against WatchPower's 17%. SimplySolar also leads on iOS requirement (9.0 vs 11.0). WatchPower's advantage is update cadence (every 3 months vs every 13 months). On price, in-app purchases, monetization model and device support there is nothing between them.

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

SimplySolar ships an update every 13 months, WatchPower every 3 months. The most recent releases landed on October 13, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | SimplySolar | WatchPower |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.5 (75 ratings)](https://appshunter.io/ios/app/watchpower/id1487569321/reviews)** |
| Number of ratings | — | **75** |
| Positive reviews | **80.0% of reviews** | 17.2% of reviews |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | Every 13 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 5 MB | 22 MB |
| Requires iOS | **9.0** | 11.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Matt Privman](https://appshunter.io/developer/1376909148) | [祥梯 孟](https://appshunter.io/developer/1070155084) |

## What reviewers say

### SimplySolar

[App page](https://appshunter.io/ios/app/simplysolar/id660625340)

This app helps users manually align solar panels and solar thermal heaters to maximize energy output. It offers a cost-effective solution for increasing solar energy viability, especially in developing regions, by replacing expensive tracking systems with a smart algorithm and simple tools. The app aims to improve lifestyles and create sustainable communities.

**Highlights:** 30-40% energy gain, Works with solar panels and thermal heaters, Increases ROI, Offline functionality, Works on cheap smartphones, Compass for True North alignment

**Features:** macOS Compatibility

**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 SimplySolar free?

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

### Is WatchPower free?

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

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

SimplySolar ships an update every 13 months, and WatchPower every 3 months. Most recently, SimplySolar was updated on October 13, 2026 and WatchPower on October 20, 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.*