Smaart RTA vs D
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Smaart RTA
Analyze audio in real time with professional-grade tools. Visualize frequency content, manage feedback, and monitor sound pressure levels with precision and ease, all from your mobile device.
- Professional RTA graph with averaging options
- Spectrograph for feedback and frequency management
- SPL meter with A & C weighting
- Adjustable RTA graph settings
- Plot calibrated levels
- Target curves
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Professionals and enthusiasts alike can now access Smaart’s Real Time Analyzer, beautifully rendered Spectrograph, and crystal clear SPL meter without needing to set up a dedicated personal computer to run a desktop version of Smaart*. Smaart RTA is capable of the same accuracy, precision, and ease of use enjoyed by live sound engineers and FOH professionals across the world using the same underlying algorithms as its desktop siblings*, trusted by sound engineers to deliver accurate and actionable data in real time. *PLEASE READ Smaart RTA creates single channel measurements only. It does not support the dual channel transfer function measurements or impulse response measurements used for system alignment and optimization, including time alignment. -- SMAART RTA INCLUDES -- -PROFESSIONAL STANDARD RTA (REAL TIME ANALYZER) GRAPH- The RTA display helps engineers ensure an audio mix or playback balance aligns with the desired tonal response for a specific artist, performance, or specification – providing real-time analysis of frequency content and confidence that you are hearing what you are seeing. Features include: Fast, Slow, None averaging options for graph response ballistics. 1/48, 1/24, 1/12, 1/6, 1/3, 1oct Banding for precision frequency resolution. 1/3 octave x-axis frequency scale for intuitively identifying center frequencies and trends. -BEATIFULLY RENDERED SPECTROGRAPH- The Spectrograph is essential for managing and controlling feedback and identifying problem frequencies, allowing engineers to quickly visualize and address potential issues before they interfere with a performance. Features include: Adjustable dynamic thresholds to customize the amplitude levels represented by the spectrograph. 1000 slices in history, allowing you to ‘rewind’ the display to view events that already happened. Intuitive color palette to represent amplitude level (dark to bright, quiet to loud). -CLEAR SPL DISPLAY WITH DB LEVEL METER- The SPL view helps you ensure audio levels remain consistent from one show to the next or check levels for uniformity across various locations within a venue. Features include: Standard SPL metrics of A & C weighting, with fast and slow response times. NIOSH and OSHA exposure percentages correspond with nationally accepted U.S. recommendations and occupational health and safety guidelines. Large Level Meter display for distant viewing. The default settings for all functions in Smaart RTA mirror those in the desktop version of Smaart v9’s real time single channel measurements. -- ADDITIONAL SMAART RTA PRO FEATURES -- Smaart RTA Pro includes the functionality of Smaart RTA and unlocks all settings and advanced features, including: Adjustable RTA Graph Settings (frequency scaling, bars/lines, line thickness, grid interval, etc) Plot Calibrated Levels to view the RTA graph relative to SPL, rather than Full Scale level only. Target Curves (Cinema X Curves included, or import your own). Capture and store RTA data traces, allowing you to compare multiple responses across different locations or venues. Average multiple stored RTA data traces to view a spatially averaged frequency response. Adjustable RTA graph Y-offsets to apply a visual dB offset to live or captured data. Import/Export RTA files (.srf) to and from Smaart desktop. Additional SPL Traffic Light display for staying within venue SPL Limits. Internal and external microphone calibration for SPL. Due to Apple's distribution policies, free trials require a subscription selection. If you would like to try Smaart RTA before you buy, start with a subscription, then cancel it to avoid billing. Smaart RTA is $1.99p/m, $19.99p/y, or $59.99 Lifetime Smaart RTA Pro is $4.99p/m, $49.99p/y or $149 Lifetime Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.rationalacoustics.com/pages/smaart-mobile-apps-privacy-policy-terms-condtions
D
Control DXR/DXS mk3 speaker parameters remotely via Bluetooth from your iOS device. Adjust levels, EQ, and more in real-time from anywhere in the venue. Monitor speaker status and manage multiple units simultaneously.
- Remote parameter control via Bluetooth
- Real-time level and EQ adjustments
- Monitor limiter activity and temperature
- Control up to ten speakers simultaneously
- Grouping for unified control
- Scene save/recall functionality
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D‑Remote is a dedicated software application that allows you to remotely control DXR/DXS mk3 parameters using your iOS device via Bluetooth. With D‑Remote, you can make adjustments from wherever you are—on stage, at FOH, or while listening from the audience area—so it’s easy to balance levels and refine sound quality in real time. It supports control of all parameters, including level, delay, EQ, crossover, FBS, ducker, identification, panel lock, and scene save/recall. In addition, D-Remote monitors each speaker’s limiter activity and temperature, and displays error alerts. The app can control up to ten DXR/DXS mk3 speakers simultaneously, and grouping is available for unified level and mute control—helping streamline setup and operation.
Screenshots
Verdict
The clearest difference is in-app purchases: D at none against Smaart RTA's 6. D also leads on rating (5.0 vs 4.8). Smaart RTA's advantage is ratings volume (490 vs 3) and iOS requirement (15.0 vs 17.0). On price, update cadence, 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
Both are free to download. Smaart RTA sells 6 in-app purchases, starting at $1.99 per month. D asks for nothing beyond the download.
D holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Smaart RTA has 490 ratings behind it against 3, so its average is the more settled of the two.
Smaart RTA ships an update every 2 months, D every 3 months. The most recent releases landed on October 23, 2026 and October 22, 2026 respectively.
| Parameter | Smaart RTA | D |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (490 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 40.6% of reviews | — |
| Number of ratings | 490 — better | 3 |
| Update frequency | Every 2 months — better | Every 3 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 11 MB | 34 MB |
| Age rating | 4+ | +4 |
| Developer | Rational Acoustics LLC | Yamaha Corporation |
Customer experience
Smaart RTA
D
In-app purchases
Smaart RTA
- Smaart RTA - Monthly7 Days trial$1.991 Month
- Smaart RTA Pro - Monthly7 Days trial$4.991 Month
- Smaart RTA - Annual7 Days trial$19.991 Year
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- Smaart RTA Pro - Annual7 Days trial$49.991 Year
- Smaart RTA - Lifetime$59.99
- Smaart RTA Pro - Lifetime$149.99
D
No in-app purchases









