System Controls vs QUARCS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
System Controls
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.
- 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
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System Control is a web browser-based application to support Wifi communication with LR devices from SilverLeaf Electronics, Inc. The LR implements a web server and RVC interface. In this way, the users can monitor and control all the devices on the RVC bus in their RVC enabled vehicles from the web browser. The beauty of System Control is to supply a quick and easy connection to the LR web interface.
QUARCS
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.
- Remote capture via Wi-Fi
- Computer remote capture via LAN
- Mount control
- Camera control
- Autoguiding
- Electric focuser control
- Stellarium skymap integration
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Q.U.A.R.C.S (QHYCCD Universal Astrophotographic Remote Capture System) is an open-source software kit that supports the full function of mobile remote capture via WIFI and computer remote capture via LAN. It includes the mount control, camera control, autoguiding, electric focuser control, and Stellarium skymap function.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | System Controls | QUARCS |
|---|---|---|
| Price | Free | Free |
| Rating | 2.9 (12 ratings) | 3.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| Number of ratings | 12 — better | 1 |
| Update frequency | Every 3 months — better | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 | 14.0 |
| Further details — not scored | ||
| Size | 5 MB | 30 MB |
| Age rating | 17+ | 4+ |
| Developer | SilverLeaf Electronics, Inc. | Light Speed Vision(Beijing) Co., Ltd |
Customer experience
System Controls
QUARCS
In-app purchases
System Controls
No in-app purchases
QUARCS
No in-app purchases
