# RETTERZeus vs E

The clearest difference is iOS requirement: E at 13.0 against RETTERZeus's 15.0. 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.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on September 24, 2026 and June 11, 2026 respectively.

## The numbers

| Metric | RETTERZeus | E |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/e-force-sli/id6449679204/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | — | Free |
| Size | 51 MB | 39 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Sascha Radermacher](https://appshunter.io/developer/528345987) | [Rescue Digital Systems GmbH](https://appshunter.io/developer/1533789837) |

## What reviewers say

### RETTERZeus

[App page](https://appshunter.io/ios/app/retterzeus/id1548013249)

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

**In-app purchases:** none


### E

[App page](https://appshunter.io/ios/app/e-force-sli/id6449679204)

Access all your E-FORCE SLi battery rescue tools in one place. This application from GENESIS RESCUE SYSTEMS provides essential functionalities for managing and utilizing your rescue equipment.

**Highlights:** Battery rescue tool access, E-FORCE SLi system management, GENESIS RESCUE SYSTEMS tools, Integrated functionalities

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RETTERZeus free?

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

### Is E free?

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

### Do RETTERZeus or E have ads?

Neither RETTERZeus nor E shows ads.

### Which is updated more often, RETTERZeus or E?

RETTERZeus ships an update every 3 months, and E every 3 months. Most recently, RETTERZeus was updated on September 24, 2026 and E on June 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.*