# SLS Gate vs Concrete Technology

The clearest difference is iOS requirement: SLS Gate at 12.0 against Concrete Technology's 15.6. 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.

SLS Gate ships an update every 4 weeks, Concrete Technology every 2 weeks. The most recent releases landed on October 16, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | SLS Gate | Concrete Technology |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 2 weeks** |
| Size | 113 MB | 65 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [SLS](https://appshunter.io/developer/1782779085) | [MAZAADY PORTAL L.L.C](https://appshunter.io/developer/1551346889) |

## What reviewers say

### SLS Gate

[App page](https://appshunter.io/ios/app/sls-gate/id6738890083)

**Features:** macOS Compatibility

**In-app purchases:** none


### Concrete Technology

[App page](https://appshunter.io/ios/app/concrete-technology/id6753213334)

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

**In-app purchases:** none


## Frequently asked questions

### Is SLS Gate free?

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

### Is Concrete Technology free?

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

### Do SLS Gate or Concrete Technology have ads?

Neither SLS Gate nor Concrete Technology shows ads.

### Which is updated more often, SLS Gate or Concrete Technology?

SLS Gate ships an update every 4 weeks, and Concrete Technology every 2 weeks. Most recently, SLS Gate was updated on October 16, 2026 and Concrete Technology on October 9, 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.*