# G vs E3 Energy

The clearest difference is update cadence: E3 Energy at every 8 days against G's every 12 months. G's advantage is iOS requirement (12.4 vs 15.1). 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.

G ships an update every 12 months, E3 Energy every 8 days. The most recent releases landed on September 16, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | G | E3 Energy |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 8 days** |
| Size | 31 MB | 31 MB |
| Requires iOS | **12.4** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vicente Dias Ribeiro](https://appshunter.io/developer/1650484260) | [E3 MOBILIDADE ELETRICA E ENERGIA LTDA](https://appshunter.io/developer/6785318535) |

## What reviewers say

### G

[App page](https://appshunter.io/ios/app/g-smart/id6443908310)

**Features:** macOS Compatibility

**In-app purchases:** none


### E3 Energy

[App page](https://appshunter.io/ios/app/e3-energy/id6785318533)

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

**In-app purchases:** none


## Frequently asked questions

### Is G free?

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

### Is E3 Energy free?

E3 Energy is free to download, with no in-app purchases.

### Do G or E3 Energy have ads?

Neither G nor E3 Energy shows ads.

### Which is updated more often, G or E3 Energy?

G ships an update every 12 months, and E3 Energy every 8 days. Most recently, G was updated on September 16, 2026 and E3 Energy on October 16, 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.*