# ECO Solar vs Solar Controller

The clearest difference is update cadence: ECO Solar at monthly against Solar Controller's every 9 months. On price, ads, in-app purchases 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.

ECO Solar ships an update monthly, Solar Controller every 9 months. The most recent releases landed on September 10, 2026 and April 26, 2026 respectively.

## The numbers

| Metric | ECO Solar | Solar Controller |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 15.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 9 months |
| Monetization | Free | — |
| Size | 5 MB | 23 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [沧毅 陈](https://appshunter.io/developer/1366185264) | [TBB Power Co., Ltd](https://appshunter.io/developer/1089239531) |

## What reviewers say

### ECO Solar

[App page](https://appshunter.io/ios/app/eco-solar/id1435579449)

Monitor your solar charger's performance with real-time PV, battery, and load status. Access your device data remotely via cloud mode and view historical performance graphs.

**Highlights:** PV/Battery/Load status monitoring, Local communication mode, Cloud communication mode, Remote device access, Historical graph viewing

**Features:** macOS Compatibility

**In-app purchases:** none


### Solar Controller

[App page](https://appshunter.io/ios/app/solar-controller/id1665008052)

**In-app purchases:** none


## Frequently asked questions

### Is ECO Solar free?

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

### Is Solar Controller free?

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

### Do ECO Solar or Solar Controller have ads?

Neither ECO Solar nor Solar Controller shows ads.

### Which is updated more often, ECO Solar or Solar Controller?

ECO Solar ships an update monthly, and Solar Controller every 9 months. Most recently, ECO Solar was updated on September 10, 2026 and Solar Controller on April 26, 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.*