RD Quantum vs HAPPY
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RD Quantum
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NOTE: You must have an xCAS user account to be able to use this app. RD Quantum is a mobile app for xCAS users. Download all license and permit data to your phone, use the GPS and compass to navigate to the area. Create notes to report back to xCAS system. Users can also see notes stored under each license.
HAPPY
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HappyQ is the iOS solution that brings together all the tools you need to collect, monitor, and analyze GNSS data in a single intuitive interface. With HappyQ you can: - Connect to GNSS receivers via BLE and receive real-time data - Monitor device status, even while the app is running in the background - Manage NTRIP connections to remote casters and receive differential corrections for improved positioning accuracy - View your current detected position on the map - Display detailed GNSS data in real time - Stream GNSS data to other compatible apps
Screenshots
Verdict
The clearest difference is update cadence: HAPPY at fortnightly against RD Quantum's every 5 weeks. RD Quantum's advantage is iOS requirement (13.0 vs 16.6). On price, ads, in-app purchases and device support 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.
RD Quantum ships an update every 5 weeks, HAPPY fortnightly. The most recent releases landed on May 17, 2026 and September 11, 2026 respectively.
| Parameter | RD Quantum | HAPPY |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 23 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Stiftelsen Revenue Development | HAPPY SURVEY Sagl |
In-app purchases
RD Quantum
No in-app purchases
HAPPY
No in-app purchases
