# Smaart RTA — RTA, Spectrograph, SPL Meter > Mobile real-time audio analyzer, spectrograph, and SPL meter for professionals. (iPhone/iPad app by Rational Acoustics LLC.) - Source: https://appshunter.io/ios/app/smaart-rta/id6738144288 (this page in markdown: same URL + `.md`) - Developer: [Rational Acoustics LLC](https://appshunter.io/developer/1755441542) - Category: Music, Utilities - Price: Free with in-app purchases - Rating: 4.80/5 from 393 App Store ratings · 31 written reviews indexed - Age rating: 4+ - Requires: iOS 15.0 · 11 MB - Languages: American English - Released: 2025-01-17 - Data updated: 2026-08-26 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/smaart-rta/id6738144288/reviews.md ## What is Smaart RTA? 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 ## Key features - 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 ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Smaart RTA Pro - Monthly | $4.99 | per month | | Smaart RTA - Monthly | $1.99 | per month | | Smaart RTA Pro - Annual | $49.99 | per year | | Smaart RTA - Annual | $19.99 | per year | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Smaart RTA Pro - Lifetime | $149.99 | one-time | | Smaart RTA - Lifetime | $59.99 | one-time | ## Chart rankings - #200 in Top Grossing · Music (US App Store) ## Recent user reviews (10 of 31) All indexed reviews: https://appshunter.io/ios/app/smaart-rta/id6738144288/reviews.md ### 3/5 — Up front cost *2026-07-10, version 1.7* I understand the Apple policy’s… I read the other ratings. Why not make the app free, no subscriptions. I’d rather have to watch an ad to use some features. As was said in another comment…. I’m probably only going to use it once. ### 5/5 — Very cool *2026-05-04, version 1.7* A very useful tool, well worth the money. The desktop version is great too! ### 2/5 — Only paid version available *2026-04-27, version 1.7* Doesn’t seem to mention it in the App Store, but to use this app you MUST pay a subscription as in-app purchase. I’m not doing that, nor am I doing a free trial just to use this once. It looks nice from the demo, like audacity packaged up but as a paid version. ### 1/5 — No free/limited option, forced subscription *2026-04-16, version 1.7* Nothing in the app listing said anything about EVERY feature being locked behind a subscription. Only after downloading the app, and expecting a limited feature set, I am greeted with a forced subscription page as soon as it opens. Sure, there’s a 7 day trial, but even the cheapest plan option is $60 to purchase outright. This is yet another, greedy, “own nothing and be happy” company that wants to push everyone to subscribe and makes a buyout option insanely overpriced. ### 5/5 — Works Great *2026-04-06, version 1.7* Used it to measure subwoofer sound curves in various locations to determine best placement for dual subs. Works perfectly for this. Has ability to track peaks. Adjusting the range of X and Y axis is a bit finicky, but not worth deducting a star from this rating. The app was super helpful for me. Thanks! ### 5/5 — 26.4 iSO 版本问题 *2026-04-02* 改系统版本下 软件启动缓慢 有的时间没监测数据 从新启动会缓解 是否有更新适配计划. **Developer response:** Please send support@rationalacoustics.com if you continue to see this issue. We'd also like to know what specific device and operating system you are using is. Best - RA ### 5/5 — She’s a beaut *2026-02-13, version 1.7* Absolutely love this app. ### 5/5 — Just get it. You’ll love it *2026-02-07, version 1.7* It’s SMAART. Easy to use and pretty close to the computer version with a real RTA mic ### 5/5 — Question *2026-02-05, version 1.7* If I purchase the lifetime pro version, can I download it for both my iPad and iPhone ? ### 4/5 — Super App aber ein Problem… *2026-01-31* Sehr zu empfehlen für „mal eben schnell“ bei Clubgigs etc. Allerdings speichert die App die Einstellungen nicht, hoffe das wird bald behoben! **Developer response:** Hello! We released an update where this was addressed. If things are still not returning, please email us to support@rationalacoustics.com and we will figure it out. Best - RA ## Frequently asked questions about Smaart RTA ### What does Smaart RTA do? Smaart RTA provides professional-grade audio analysis tools, including a Real Time Analyzer (RTA), a Spectrograph, and an SPL meter, directly on your mobile device. It allows users to visualize frequency content, manage feedback, and monitor sound pressure levels with accuracy comparable to its desktop counterpart. ### What are the key features of Smaart RTA? Key features include a professional RTA graph with customizable averaging and banding, a spectrograph with adjustable thresholds and history, and an SPL meter with standard metrics and exposure percentages. The Pro version unlocks advanced settings like calibrated level plotting and target curves. ### Is Smaart RTA free to use? The base Smaart RTA app offers core functionality. However, to unlock all settings and advanced features, such as adjustable RTA graph settings, calibrated level plotting, and target curves, an in-app purchase for Smaart RTA Pro is required. ### What kind of measurements does Smaart RTA support? Smaart RTA creates single-channel measurements. It is important to note that it does not support dual-channel transfer function measurements or impulse response measurements, which are typically used for system alignment and optimization. ### Who would benefit from using Smaart RTA? Live sound engineers, FOH professionals, audio technicians, and serious audio enthusiasts would benefit from Smaart RTA. It's ideal for anyone who needs to quickly and accurately analyze audio environments, troubleshoot sound issues, or ensure consistent audio levels without needing a dedicated computer. ## Version history (last 5 releases) ### 1.7 — 2026-01-24 • Updated File import behavior for microphone correction curves and target curves • Reduced axis scroll sensitivity • Added Infinite Averaging • Fixed a bug when settings was open in landscape view • Fixed a bug where settings did not relocate when rotating while open. ### 1.6 — 2025-06-10 - Added ability to set SPL Calibration offset manually for external microphones (Pro feature) - Improved SPL Overload behavior with persistent value readout - Improved SPL Only plot readout padding and font sizing - Allow Portrait Orientation upside down rotation (iPad only) - Allow direct text entry for SPL Leq time value - Fixed bug where settings were not persistent - Added Rate this App button in Settings and App rating triggers - Improved file management behavior for Mic Correction and Target Curves - Improved various performance optimizations ### 1.5 — 2025-04-22 - Redesigned welcome screens and purchasing workflow - Reduced the cost of RTA Pro Monthly from $5.99 to $4.99 - Added support for dual-license purchases for users who would like to purchase Smaart RTA Lifetime, but also subscribe to Smaart RTA Pro periodically. ### 1.4 — 2025-03-26 Smaart RTA Update 1.4 - Added tap on Max SPL value to reset it - Updated generic calibration offset to 120dB - Fixed a bug with importing .txt files as microphone correction curves ### 1.2 — 2025-02-02 Release notes - Smaart RTA - 1.2 Added Support for offline use Added 114dB as a calibrator level option Added a Show/Hide icon for live measurements for RTA Pro users Added retention of shown measurements when a plot is toggled on/off Added detection of light/dark mode to update help file background/text Updated look and feel of data library Updated SPL calibration field to be A weighted slow instead of unweighted Allowed spectrograph to stay running when a captured measurement is focused Fixed a bug where the text field for the help file was not read-only ## Apps similar to Smaart RTA | App | Rating | Price | Category | | --- | --- | --- | --- | | [AUDIIO - RTA Analyzer](https://appshunter.io/ios/app/audiio-rta-analyzer/id1466746908) | 4.3 (90) | Free | Music | | [DM7 StageMix](https://appshunter.io/ios/app/dm7-stagemix/id1635466119) | 2.3 (6) | Free | Music | | [WING Copilot](https://appshunter.io/ios/app/wing-copilot/id1447618712) | 2.0 (1) | Free | Music | | [Audio Spectrum Analyzer Pro](https://appshunter.io/ios/app/audio-spectrum-analyzer-pro/id1152352806) | 4.4 (238) | Free | Music | | [DriveRack PA2 Control](https://appshunter.io/ios/app/driverack-pa2-control/id817149833) | 3.2 (108) | Free | Music | | [RTA Audio](https://appshunter.io/ios/app/rta-audio/id525324684) | 3.6 (31) | Free | Music | ## Related topics [smart rta app](https://appshunter.io/ios/topics/smart-rta-app) · [real time analyzer](https://appshunter.io/ios/topics/real-time-analyzer) · [smaart rta](https://appshunter.io/ios/topics/smaart-rta) · [smaart](https://appshunter.io/ios/topics/smaart) · [rta audio](https://appshunter.io/ios/topics/rta-audio) · [rta analyzer](https://appshunter.io/ios/topics/rta-analyzer) · [spectrum analyzer rta](https://appshunter.io/ios/topics/spectrum-analyzer-rta) · [octave rta](https://appshunter.io/ios/topics/octave-rta) · [sound analyzer](https://appshunter.io/ios/topics/sound-analyzer) · [rta audio tool](https://appshunter.io/ios/topics/rta-audio-tool) · [rta app](https://appshunter.io/ios/topics/rta-app) · [rta](https://appshunter.io/ios/topics/rta) · [lexus navigation app](https://appshunter.io/ios/topics/lexus-navigation-app) · [room acoustics measurement](https://appshunter.io/ios/topics/room-acoustics-measurement) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-26.*