# E4Şarj vs Green Science

E4Şarj and Green Science are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

E4Şarj ships an update every 3 months, Green Science every 2 months. The most recent releases landed on September 14, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | E4Şarj | Green Science |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Size | 29 MB | 56 MB |
| Requires iOS | 16.0 | **15.5** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [TT Ventures Proje Geliştirme](https://appshunter.io/developer/1522218129) | [ZEY ENERJI SANAYI VE TICARET ANONIM SIRKETI](https://appshunter.io/developer/1772906289) |

## What reviewers say

### E4Şarj

[App page](https://appshunter.io/ios/app/e4sarj/id6447972292)

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

**In-app purchases:** none


### Green Science

[App page](https://appshunter.io/ios/app/green-science/id6736655887)

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

**In-app purchases:** none


## Frequently asked questions

### Is E4Şarj free?

E4Şarj is free to download, with no in-app purchases.

### Is Green Science free?

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

### Do E4Şarj or Green Science have ads?

Neither E4Şarj nor Green Science shows ads.

### Which is updated more often, E4Şarj or Green Science?

E4Şarj ships an update every 3 months, and Green Science every 2 months. Most recently, E4Şarj was updated on September 14, 2026 and Green Science 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.*