QUESTRA Panels vs RDTap
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
QUESTRA Panels
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QUESTRA® Panels serve as the control center for networked LD Systems installation solutions. Using QUESTRA® Software you can design simple and intuitive interfaces which allow easy control of your system. Simply download QUESTRA® Panels on your iOS device, assign your custom panel design to the device, and you're ready to control. Designed as an integral part of QUESTRA®, QUESTRA® Panels is your interface to control and manage your system. Please note: 1. QUESTRA® v1.4.20 is required 2. This application is for controlling functionality only, not for creating or modifying panels. 3. QUESTRA® Panels requires the setup and design process to be handled by the QUESTRA® Software. With the QUESTRA® Software for Windows, you have the freedom to design and customize your panel functionality with its built-in editor. You can create users, assign specific roles, restrict access to certain functions, and ensure that critical network settings remain unmodified.
RDTap
Control and configure SUB 90XX series subwoofers with access to internal parameters. Offers professionally tuned presets for seamless integration with top speakers and supports rapid setup for ground stacking or sub cluster configurations.
- Access internal subwoofer parameters
- Advanced Crossover Engine (ACE) presets
- Professionally tuned level and phase matching
- Ground stacking and sub cluster configuration
- Rapid setup for speaker designs
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RDTap is dedicated to the SUB 90XX family of touring subwoofers (https://www.rcf.it/en/sub-9000-series), providing full access to their internal parameters. Several presets are available for their internal Advanced Crossover Engine (ACE), offering a professionally tuned match, both in level and phase, between the subwoofer itself and a selection of top speakers. In addition, a Ground Stacking or Sub Cluster combination of up to 3 subwoofers and one or more top speakers (defined as Design) can be rapidly defined and configured, with simple programming steps.
Screenshots
Verdict
The clearest difference is update cadence: RDTap at fortnightly against QUESTRA Panels's every 5 weeks. QUESTRA Panels's advantage is iOS requirement (12.0 vs 15.0). 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.
QUESTRA Panels ships an update every 5 weeks, RDTap fortnightly. The most recent releases landed on September 12, 2026 and July 7, 2026 respectively.
| Parameter | QUESTRA Panels | RDTap |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 50.0% of reviews |
| Update frequency | Every 5 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 67 MB | 36 MB |
| Age rating | 4+ | 4+ |
| Developer | ADAM HALL GMBH | RCF spa |
In-app purchases
QUESTRA Panels
No in-app purchases
RDTap
No in-app purchases









