# SolarPower Wi vs Cotton Trace

The clearest difference is iOS requirement: SolarPower Wi at 11.0 against Cotton Trace's 15.0. 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.

Both ship on a similar rhythm, roughly every 3 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | SolarPower Wi | Cotton Trace |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.5 (35 ratings)](https://appshunter.io/ios/app/solarpower-wi-fi/id1491698936/reviews)** | — |
| Number of ratings | **35** | — |
| Positive reviews | 21.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free | — |
| Size | 21 MB | 6 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [祥梯 孟](https://appshunter.io/developer/1070155084) | [Salman Akram](https://appshunter.io/developer/1690368546) |

## What reviewers say

### SolarPower Wi

[App page](https://appshunter.io/ios/app/solarpower-wi-fi/id1491698936)

Monitor hybrid inverters via Wi-Fi module on your iOS device. View device status, configure settings, receive notifications for warnings or alarms, and record historical data.

**Highlights:** Monitor hybrid inverters, Wi-Fi module connectivity, Display device status, Configure device settings, Warning and alarm notifications, Record device data history

**Features:** macOS Compatibility

**In-app purchases:** none


### Cotton Trace

[App page](https://appshunter.io/ios/app/cotton-trace-it/id6449741608)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SolarPower Wi free?

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

### Is Cotton Trace free?

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

### Do SolarPower Wi or Cotton Trace have ads?

Neither SolarPower Wi nor Cotton Trace shows ads.

### Which is updated more often, SolarPower Wi or Cotton Trace?

SolarPower Wi ships an update every 3 months, and Cotton Trace every 3 months. Most recently, SolarPower Wi was updated on November 3, 2026 and Cotton Trace 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.*