# Z vs Smart

The clearest difference is iOS requirement: Z at 11.0 against Smart's 13.0. 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.

Z ships an update fortnightly, Smart every 2 weeks. The most recent releases landed on September 15, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Z | Smart |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 weeks |
| Size | 38 MB | 64 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Zhongrui Green Energy Technology (Shenzhen) Co., Ltd.](https://appshunter.io/developer/1549908840) | [Ruihe Energy (Shenzhen) Co.,Ltd.](https://appshunter.io/developer/1777005017) |

## What reviewers say

### Z

[App page](https://appshunter.io/ios/app/z-cloud/id6444879748)

**Features:** macOS Compatibility

**In-app purchases:** none


### Smart

[App page](https://appshunter.io/ios/app/smart-energy/id6737540195)

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

**In-app purchases:** none


## Frequently asked questions

### Is Z free?

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

### Is Smart free?

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

### Do Z or Smart have ads?

Neither Z nor Smart shows ads.

### Which is updated more often, Z or Smart?

Z ships an update fortnightly, and Smart every 2 weeks. Most recently, Z was updated on September 15, 2026 and Smart on September 11, 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.*