RTA Pro vs NDI HX Camera
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RTA Pro
Transform your iOS device into a professional audio analysis tool. Analyze ambient noise frequencies, pinpoint room resonance, and set up sound systems for events. Features include custom calibration, multiple display modes, and adjustable speed settings.
- Real-time audio spectrum analysis
- Frequency range 32Hz to 16kHz
- Linear, dB(A), and dB(C) weightings
- 1/3 Octave Bands, Octave Bands, and FFT display
- Adjustable speed settings
- Custom calibration options
Read full descriptionHide full description
RTA Pro is a real time audio spektrum analyzer. It turns your iOS device into a powerful audio test system usually seen only in audio research laboratories and music studios. Such instruments are used to analyze the frequency spectrum of ambient noise, e.g. to be able to pinpoint frequencies which cause rumble in a room. Another use is the level setting setting of PA systems for concerts. Features: RTA Pro requires iOS11 or later and has been calibrated for the microphones of most iPhones. Custom calibration is also possible. The frequency range is 32Hz to 16kHz. Linear display, as well as weightings for measuring dB(A) and dB(C) is provided. Apart from 1/3 Octave Bands and Octave Bands, RTA Pro also features the display of a Fast Fourier Transform (FFT). The speed is adjustable to impulse, 128ms and 1 second.
NDI HX Camera
Transform your smartphone into an HD IP camera for professional video production. Stream high-quality video in real-time to OBS, NDI systems, and other compatible software. Ideal for content creators, journalists, and live event broadcasters seeking a portable and integrated solution.
- Real-time NDI streaming
- HD IP camera functionality
- OBS and NDI compatibility
- High-definition video capture
- User-friendly interface
- Efficient local network use
Read full descriptionHide full description
Transform your smartphone into a powerful broadcasting tool with our innovative app, designed to seamlessly integrate your mobile device into any professional video production setup. Ideal for journalists, content creators, and live event broadcasters, our app turns your smartphone into an HD IP camera, delivering high-quality video streams directly to OBS, NDI systems, and other NDI-compatible software or hardware. Key Features: Real-Time NDI Streaming: Convert your phone’s camera into a high-quality NDI camera, enabling real-time video streaming over local networks with minimal latency. Versatile Compatibility: Whether you're using OBS Camera for live streaming, incorporating footage into Larix Broadcaster setups, or managing streams with IP Cam Controller, our app ensures compatibility and ease of integration. Advanced Capture Technologies: Experience professional-grade capture NDI with features tailored for both NDI camera systems and standard IP webcam functionalities. High Definition Streaming: Supports HD-IPCam standards and Webcams HD to deliver crystal-clear video content, ensuring your streams look professional on all broadcasting platforms. Efficient Local Network Use: Optimized for IPCam Lite environments and designed to work flawlessly in limited bandwidth scenarios, providing a robust solution for IP camera streaming. User-Friendly Interface: Simple setup and an intuitive user interface allow you to start streaming instantly, turning your device into an IP webcam or a comprehensive IP cam controller with just a few taps. This app is perfect for users looking to extend the capabilities of their mobile devices, offering a portable, high-quality video solution that integrates smoothly with existing broadcasting technologies. Whether it's streaming a live concert, reporting from the field, or creating content from your home studio, our app ensures your video captures are seamless and professional. This app is using the standard Apple Terms of Use (EULA) https://www.apple.com/legal/ internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is price: NDI HX Camera at Free against RTA Pro's $5.99. NDI HX Camera also leads on ratings volume (529 vs 2) and iOS requirement (14.0 vs 17.6). RTA Pro's advantage is review sentiment (50% vs 11%) and in-app purchases (none vs 4). On rating, ads 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
NDI HX Camera is free to download; RTA Pro costs $5.99 up front. NDI HX Camera sells 4 in-app purchases, starting at $4.99 per month. RTA Pro asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.5 for RTA Pro against 4.4 for NDI HX Camera. That said, the two scores are not equally well evidenced: NDI HX Camera has 529 ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 50% of RTA Pro's written reviews are positive against 11% of NDI HX Camera's.
RTA Pro ships an update every 3 months, NDI HX Camera every 5 months. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.
| Parameter | RTA Pro | NDI HX Camera |
|---|---|---|
| Price | $5.99 | Free — better |
| Rating | 4.5 (2 ratings) — better | 4.4 (529 ratings) |
| Positive reviews | 50.0% of reviews — better | 10.6% of reviews |
| Number of ratings | 2 | 529 — better |
| Update frequency | Every 3 months — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 14.0 — better |
| Further details — not scored | ||
| Size | 12 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Matthias Schorer | 新雨 李 |
Customer experience
RTA Pro
NDI HX Camera
Bugs and requests
RTA Pro
Not enough reviews yet to summarise bugs or requests.
NDI HX Camera
Reported bugs
9 issues- App times out or freezes after 5-20 minutes of use
- Black screen or no video output despite connection
- Settings gear icon doesn't respond to taps
- App crashes and locks up device requiring restart
- Audio not working on iPhone 15 Pro
Show 4 moreShow fewer
- NDI signal not detected by receiving software
- Incompatibility with iPad display scaling
- App frozen on startup with no button response
- Video stream stalls periodically
Requested features
8 requests- FPS and codec customization options
- Resolution and quality control settings
- Audio transmission support
- Remote zoom control via device remote
- Screen mirroring capability (not just camera)
Show 3 moreShow fewer
- iPad full-screen support
- Lower resolution options below 1080p30
- Better documentation of paid vs free features
In-app purchases
RTA Pro
No in-app purchases
NDI HX Camera
- Unlimited access$4.991 Month
- Unlimited access$9.993 Months
- Unlimited access$14.996 Months
Show 1 moreShow fewer
- Unlimited access$19.991 Year
Questions
Is RTA Pro free?
Is NDI HX Camera free?
Which has better reviews, RTA Pro or NDI HX Camera?
Do RTA Pro or NDI HX Camera have ads?
Which is updated more often, RTA Pro or NDI HX Camera?
Other comparisons















