# System Controls vs QUARCS

The clearest difference is ratings volume: System Controls at 12 against QUARCS's 1. System Controls also leads on update cadence (every 3 months vs every 6 months). On price, rating, review sentiment and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 2.9 for System Controls against 3.0 for QUARCS. That said, the two scores are not equally well evidenced: System Controls has 12 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 0% and 0% positive.

System Controls ships an update every 3 months, QUARCS every 6 months. The most recent releases landed on June 7, 2026 and August 13, 2026 respectively.

## The numbers

| Metric | System Controls | QUARCS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.9 (12 ratings)](https://appshunter.io/ios/app/system-controls/id1203452611/reviews) | **[3.0 (1 ratings)](https://appshunter.io/ios/app/quarcs/id6479396546/reviews)** |
| Number of ratings | **12** | 1 |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 6 months |
| Monetization | Free | Free |
| Size | 5 MB | 30 MB |
| Requires iOS | 14.0 | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [SilverLeaf Electronics, Inc.](https://appshunter.io/developer/574200631) | [Light Speed Vision(Beijing) Co., Ltd](https://appshunter.io/developer/1511662353) |

## What reviewers say

### System Controls

[App page](https://appshunter.io/ios/app/system-controls/id1203452611)

Monitor and control vehicle devices connected to an RVC bus via a web browser. This application provides a quick and easy connection to the LR web interface for seamless management.

**Highlights:** Web browser-based control, Supports Wifi communication with LR devices, Monitors and controls RVC bus devices, Quick and easy connection to LR web interface, RVC enabled vehicle support

**Features:** macOS Compatibility

**In-app purchases:** none


### QUARCS

[App page](https://appshunter.io/ios/app/quarcs/id6479396546)

This open-source software kit enables remote astrophotography capture via Wi-Fi and computer. It offers comprehensive control over telescope mounts, cameras, autoguiding, and electric focusers, integrating with Stellarium for sky mapping.

**Highlights:** Remote capture via Wi-Fi, Computer remote capture via LAN, Mount control, Camera control, Autoguiding, Electric focuser control, Stellarium skymap integration

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is System Controls free?

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

### Is QUARCS free?

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

### Which has better reviews, System Controls or QUARCS?

QUARCS is rated higher. System Controls averages 2.9 out of 5 from 12 ratings, while QUARCS averages 3.0 from 1 ratings.

### Do System Controls or QUARCS have ads?

Neither System Controls nor QUARCS shows ads.

### Which is updated more often, System Controls or QUARCS?

System Controls ships an update every 3 months, and QUARCS every 6 months. Most recently, System Controls was updated on June 7, 2026 and QUARCS on August 13, 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.*