# SAS Centre vs ReliverN

The clearest difference is update cadence: ReliverN at every 5 weeks against SAS Centre's every 3 months. ReliverN also leads on iOS requirement (15.1 vs 17.0). 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.

SAS Centre ships an update every 3 months, ReliverN every 5 weeks. The most recent releases landed on September 28, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | SAS Centre | ReliverN |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 7 MB | 15 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Ergun Karabulut](https://appshunter.io/developer/1381410180) | [Piri Hesap](https://appshunter.io/developer/1528801393) |

## What reviewers say

### SAS Centre

[App page](https://appshunter.io/ios/app/sas-centre/id1381410181)

This app offers personalized audio courses designed to enhance brain processing, leading to improvements in attention, learning, and emotional well-being. It requires no active participation and can be used while sleeping, making it a convenient tool for self-improvement.

**Highlights:** Personalized audio courses, Improves attention and concentration, Enhances learning and cognition, Supports emotional well-being, Works passively, even during sleep, Direct communication with provider

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

**In-app purchases:** none


### ReliverN

[App page](https://appshunter.io/ios/app/relivern-app/id6739958527)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SAS Centre free?

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

### Is ReliverN free?

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

### Do SAS Centre or ReliverN have ads?

Neither SAS Centre nor ReliverN shows ads.

### Which is updated more often, SAS Centre or ReliverN?

SAS Centre ships an update every 3 months, and ReliverN every 5 weeks. Most recently, SAS Centre was updated on September 28, 2026 and ReliverN on October 12, 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.*