# EvaSmartCylinder vs Solar Controller

The clearest difference is update cadence: Solar Controller at every 9 months against EvaSmartCylinder's every 20 months. Solar Controller also leads on iOS requirement (13.0 vs 15.0). 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.

EvaSmartCylinder ships an update every 20 months, Solar Controller every 9 months. The most recent releases landed on October 7, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | EvaSmartCylinder | Solar Controller |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 9 months** |
| Size | 44 MB | 23 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ASİS OTOMASYON A.Ş.](https://appshunter.io/developer/1225858146) | [TBB Power Co., Ltd](https://appshunter.io/developer/1089239531) |

## What reviewers say

### EvaSmartCylinder

[App page](https://appshunter.io/ios/app/evasmartcylinder/id1591174195)

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

**In-app purchases:** none


### Solar Controller

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

**In-app purchases:** none


## Frequently asked questions

### Is EvaSmartCylinder free?

EvaSmartCylinder 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 EvaSmartCylinder or Solar Controller have ads?

Neither EvaSmartCylinder nor Solar Controller shows ads.

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

EvaSmartCylinder ships an update every 20 months, and Solar Controller every 9 months. Most recently, EvaSmartCylinder was updated on October 7, 2026 and Solar Controller on September 25, 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.*