RTA

Name: RTA
Rating: 4.0 (25 reviews)
Author: Andrew Smith

by Andrew Smith

iPhone · iPad

Active Last checked 5 Aug 2026

App Store ↗

Quick verdict

What it is: Store information collected; independent summary not yet available.
At a glance: $4.99
In-app purchases

Categories and search queries

Official categories

Music
Utilities

AppCorpus categories

Key functions

Function	Availability	Access	Scope	Evidence
In-app purchases	Yes	Limited free	—	Store published

Screens

App Store

6 store screenshots

Pricing & paywalls

App Store

Shown for US

Price: $4.99
Reference Curve Files — $9.99
STC -- Transmission Loss — $9.99

Last verified 5 Aug 2026

Ratings & reviews

App Store

Shown for US

4.0 25 ratings · App Store

4/5How accurate?
How accurate is this compare to a calibrated measuring mic? My goal is to EQ my room to have a flat response. I have an iPhone XS Max.

starfall88 · 5 Aug 2026
5/5The best iOS RTA
Ignore all of the rest of them because this one is actually calibrated for your iOS device. I tried other apps setting up my vehicle and this one is obviously accurate. After about 10 minutes of tweaking the EQ on my head unit my new speakers sound 1 million times better. If you have a hard time setting your EQ to sound good this one will get you there.

Blake.is · 5 Aug 2026
5/5Super RTA!!!
I use this app at least 8 days a week! When the new iOS update came out the app was having problems fitting the screen. Everything still worked as expected, just smaller. I emailed the developer about the issue and had a response in 5 minutes! That is customer support if over seen it. In the response I was assured the new update is awaiting approval from Apple. Thanks Andrew for keeping us all afloat.

Thicks34 · 5 Aug 2026
5/5Good tool
I normally use smaart to tune but I’ve had this app for a long time and I still use it in a pinch. I’ve checked out some of the other RTA apps and overall I have to say this one. Straightforward, no unnecessary bells and whistles. Highly likely built by someone who actually works in the industry

chsound · 5 Aug 2026
5/5What a huge help this app is
Used with iPad mini. Ran pink noise to do the best I could to flatten the sound. What a difference this made! I can see areas that need improvement but I need DSP. For now this works! Thank you

Speedn20 · 5 Aug 2026

Privacy & accessibility

App Store

Privacy

Data Not Collected Developer declared

Accessibility

No accessibility labels collected yet.

Versions

App Store

10.0
-Bug fixes and stability improvements -Support for direct data file access in Files app -Support for latest devices and iOS versions
10.1
-Bug fixes and improvements -Fixed Generator not working correctly
10.2
-Bug fixes and improvements
10.3
-Bug fixes and stability improvements -Now automatically loads iTestMic2 calibration files
10.4
-Bug fixes and stability improvements -Added user registration feature
10.5
-Added support for Bluetooth speakers -Bug fixes and stability improvements
11.0
-Bug fixes and stability improvements -Updated for latest iOS and devices
11.1
-Bug fixes and improvements -Support for more iOS devices and iOS versions
11.2
-Bug fixes and stability improvements -Support for latest iOS versions and devices
11.3
-Updated for latest iOS devices and new iOS versions -Bug fixes and stability improvements
11.4
-Updated with latest devices and bug fixes -Fixed audio startup issues at app start
11.5
-Updated with latest iOS devices and calibrations
11.6
-Updated for latest iOS devices and calibrations -Bug fixes and operational improvements
11.7
-Updated for new iOS devices -Bug fixes and stability improvements
11.8 · 22 Dec 2025
-Bug fixes and stability improvements
8.7
-Bug fixes and stability improvements
8.8
General - Added Calibration Error Report link to support page - Fixed crash on iOS 11 when saving screenshots - Fixed crashes on iOS 8 and iOS 9 - Fixed issue with multiple Studio Six Digital apps trying to access our accessories - Updated App Store in-app purchase accessing and authorization for iOS 11 Live Calibration Updates - Added cloud-based database for all iOS devices that can be updated in real time - All devices included - Includes local default files, in case a device has no internet connectivity - Different databases for each major iOS version, starting with iOS 10 - New iPhones added to live calibration database
8.9
-App no longer runs in the background unless decay mode is set to average (continuous run) -Fixed problems with Save/Recall button.
9.0
-Upgraded for latest iOS and iOS devices -Now supports iPhone X and other screens -Bug fixes and stability improvements
9.1
-Updated for latest iOS and new devices -Bug fixes and stability improvements
9.2
-Updated for latest iOS devices -Bug fixes and stability improvements
9.3
-Updated for iOS 13 -Fixed issue with setup menu -Bug fixes and stability improvements
9.4
-Fixed orientation issues in iOS 13 -Bug fixes and stability improvements
9.5
-Updated for iOS 13 -Bug fixes and compatibility improvements
9.6
-Fixes crash on launch in iOS 9/10

Show more Show less

Alternatives

Audio Spectrum Analyzer Pro — Same category + similar ratings
Audio Spectrum Analyzer dB RTA — Same category + similar ratings

Availability by market

No LIVE observation for DE yet.

Data quality & evidence

Page completeness: Live store listing
Last verified: 5 Aug 2026
Sources: App Store

Independent summary has not been published yet.

Report a correction

Use this page with an AI agent

AppCorpus MCP gives your agent current app data, prices, screens, features and sources.

Example prompt

Compare RTA with Audio Spectrum Analyzer Pro.

View JSON

GET /api/v3/apps/298839433

{
  "app_id": 298839433,
  "canonical_url": "https://appcorpus.com/apps/rta-298839433",
  "identity": {
    "name": "RTA",
    "slug": "rta",
    "developer": {
      "name": "Andrew Smith",
      "url": "https://appcorpus.com/developers/andrew-smith-developer_530d2f2d548706e8e14cf66c094384ff"
    },
    "icon_url": "https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/7b/9a/25/7b9a2500-80e1-6ffa-634c-77e4dc7bba28/RTA_AppIcon-0-0-1x_U007emarketing-0-10-0-85-220.png/512x512bb.jpg",
    "stores": [
      "apple"
    ],
    "platforms": [
      "iphone",
      "ipad"
    ],
    "status": {
      "state": "active",
      "label": "Active",
      "last_checked": "2026-08-05",
      "last_checked_label": "5 Aug 2026",
      "banner": null,
      "region_note": null
    }
  },
  "listings": [
    {
      "store": "apple",
      "status": "ACTIVE",
      "url": "https://apps.apple.com/us/app/rta/id298839433?uo=4",
      "rating": 4.0,
      "rating_count": 25,
      "formatted_price": "$4.99",
      "is_free": false,
      "has_iap": true,
      "has_subscription": false,
      "version": "11.8",
      "updated": "2025-12-22",
      "currency": "USD"
    }
  ],
  "summary": {
    "one_liner": null,
    "summary": null,
    "best_for": [],
    "not_for": [],
    "status": "fallback",
    "at_a_glance": [
      "$4.99",
      "In-app purchases"
    ]
  },
  "categories": {
    "official": [
      "Music",
      "Utilities"
    ],
    "appcorpus": [
      {
        "category_id": "music",
        "label": "Music",
        "url": "https://appcorpus.com/categories/music"
      },
      {
        "category_id": "utilities",
        "label": "Utilities",
        "url": "https://appcorpus.com/categories/utilities"
      }
    ]
  },
  "use_cases": [],
  "features": [
    {
      "capability_id": "in_app_purchases",
      "label": "In-app purchases",
      "availability": "yes",
      "access_level": "free_limited",
      "scope": null,
      "evidence": "Store published"
    }
  ],
  "pricing": [
    {
      "store": "apple",
      "formatted_price": "$4.99",
      "is_free": false,
      "has_iap": true,
      "has_subscription": false,
      "currency": "USD",
      "market": "de",
      "last_verified": "2026-08-05",
      "rows": [
        "Price: $4.99",
        "Reference Curve Files — $9.99",
        "STC -- Transmission Loss — $9.99"
      ]
    }
  ],
  "screens": [
    {
      "url": "https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/64/1c/6e/641c6e45-c2d7-7930-3cca-5929e0388aaa/pr_source.jpg/1600x1600bb.jpg",
      "store": "apple",
      "platform": "ipad",
      "alt": "RTA ipad screenshot 1"
    },
    {
      "url": "https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/93/02/4d/93024df2-1cf3-fa9b-9287-bbc187d52341/pr_source.jpg/1600x1125bb.jpg",
      "store": "apple",
      "platform": "iphone",
      "alt": "RTA iphone screenshot 2"
    },
    {
      "url": "https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/dc/73/5f/dc735f80-e4d9-a7fa-5d6d-fee190d7bbb2/pr_source.jpg/1600x1125bb.jpg",
      "store": "apple",
      "platform": "iphone",
      "alt": "RTA iphone screenshot 3"
    },
    {
      "url": "https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/8a/7c/c4/8a7cc409-000e-59b9-fab3-bfaaae8283fa/pr_source.jpg/1600x1125bb.jpg",
      "store": "apple",
      "platform": "iphone",
      "alt": "RTA iphone screenshot 4"
    },
    {
      "url": "https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/4e/ed/0a/4eed0ab1-03ee-63d4-2321-9ea320cadcc0/pr_source.jpg/1125x1600bb.jpg",
      "store": "apple",
      "platform": "iphone",
      "alt": "RTA iphone screenshot 5"
    },
    {
      "url": "https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/e8/d6/af/e8d6afa4-2298-1add-2dc3-07e54480697d/pr_source.jpg/1125x1600bb.jpg",
      "store": "apple",
      "platform": "iphone",
      "alt": "RTA iphone screenshot 6"
    }
  ],
  "ratings": [
    {
      "store": "apple",
      "average": 4.0,
      "count": 25,
      "market": "de",
      "observed_at": "2026-08-05",
      "reviews": [
        {
          "rating": 4,
          "title": "How accurate?",
          "body": "How accurate is this compare to a calibrated measuring mic? My goal is to EQ my room to have a flat response. I have an iPhone XS Max.",
          "author": "starfall88",
          "date": "5 Aug 2026"
        },
        {
          "rating": 5,
          "title": "The best iOS RTA",
          "body": "Ignore all of the rest of them because this one is actually calibrated for your iOS device. I tried other apps setting up my vehicle and this one is obviously accurate. After about 10 minutes of tweaking the EQ on my head unit my new speakers sound 1 million times better. If you have a hard time setting your EQ to sound good this one will get you there.",
          "author": "Blake.is",
          "date": "5 Aug 2026"
        },
        {
          "rating": 5,
          "title": "Super RTA!!!",
          "body": "I use this app at least 8 days a week! When the new iOS update came out the app was having problems fitting the screen. Everything still worked as expected, just smaller. I emailed the developer about the issue and had a response in 5 minutes! That is customer support if over seen it. In the response I was assured the new update is awaiting approval from Apple. Thanks Andrew for keeping us all afloat.",
          "author": "Thicks34",
          "date": "5 Aug 2026"
        },
        {
          "rating": 5,
          "title": "Good tool",
          "body": "I normally use smaart to tune but I’ve had this app for a long time and I still use it in a pinch. I’ve checked out some of the other RTA apps and overall I have to say this one. Straightforward, no unnecessary bells and whistles. Highly likely built by someone who actually works in the industry",
          "author": "chsound",
          "date": "5 Aug 2026"
        },
        {
          "rating": 5,
          "title": "What a huge help this app is",
          "body": "Used with iPad mini. Ran pink noise to do the best I could to flatten the sound. What a difference this made! I can see areas that need improvement but I need DSP. For now this works! Thank you",
          "author": "Speedn20",
          "date": "5 Aug 2026"
        }
      ]
    }
  ],
  "privacy": [
    {
      "store": "apple",
      "declarations": [
        {
          "title": "Data Not Collected",
          "detail": "",
          "source": "Developer declared"
        }
      ],
      "accessibility": []
    }
  ],
  "changes": [
    {
      "store": "apple",
      "version": "10.0",
      "released_at": null,
      "notes": "-Bug fixes and stability improvements -Support for direct data file access in Files app -Support for latest devices and iOS versions"
    },
    {
      "store": "apple",
      "version": "10.1",
      "released_at": null,
      "notes": "-Bug fixes and improvements -Fixed Generator not working correctly"
    },
    {
      "store": "apple",
      "version": "10.2",
      "released_at": null,
      "notes": "-Bug fixes and improvements"
    },
    {
      "store": "apple",
      "version": "10.3",
      "released_at": null,
      "notes": "-Bug fixes and stability improvements -Now automatically loads iTestMic2 calibration files"
    },
    {
      "store": "apple",
      "version": "10.4",
      "released_at": null,
      "notes": "-Bug fixes and stability improvements -Added user registration feature"
    },
    {
      "store": "apple",
      "version": "10.5",
      "released_at": null,
      "notes": "-Added support for Bluetooth speakers -Bug fixes and stability improvements"
    },
    {
      "store": "apple",
      "version": "11.0",
      "released_at": null,
      "notes": "-Bug fixes and stability improvements -Updated for latest iOS and devices"
    },
    {
      "store": "apple",
      "version": "11.1",
      "released_at": null,
      "notes": "-Bug fixes and improvements -Support for more iOS devices and iOS versions"
    },
    {
      "store": "apple",
      "version": "11.2",
      "released_at": null,
      "notes": "-Bug fixes and stability improvements -Support for latest iOS versions and devices"
    },
    {
      "store": "apple",
      "version": "11.3",
      "released_at": null,
      "notes": "-Updated for latest iOS devices and new iOS versions -Bug fixes and stability improvements"
    },
    {
      "store": "apple",
      "version": "11.4",
      "released_at": null,
      "notes": "-Updated with latest devices and bug fixes -Fixed audio startup issues at app start"
    },
    {
      "store": "apple",
      "version": "11.5",
      "released_at": null,
      "notes": "-Updated with latest iOS devices and calibrations"
    },
    {
      "store": "apple",
      "version": "11.6",
      "released_at": null,
      "notes": "-Updated for latest iOS devices and calibrations -Bug fixes and operational improvements"
    },
    {
      "store": "apple",
      "version": "11.7",
      "released_at": null,
      "notes": "-Updated for new iOS devices -Bug fixes and stability improvements"
    },
    {
      "store": "apple",
      "version": "11.8",
      "released_at": "2025-12-22",
      "notes": "-Bug fixes and stability improvements"
    },
    {
      "store": "apple",
      "version": "8.7",
      "released_at": null,
      "notes": "-Bug fixes and stability improvements"
    },
    {
      "store": "apple",
      "version": "8.8",
      "released_at": null,
      "notes": "General - Added Calibration Error Report link to support page - Fixed crash on iOS 11 when saving screenshots - Fixed crashes on iOS 8 and iOS 9 - Fixed issue with multiple Studio Six Digital apps trying to access our accessories - Updated App Store in-app purchase accessing and authorization for iOS 11 Live Calibration Updates - Added cloud-based database for all iOS devices that can be updated in real time - All devices included - Includes local default files, in case a device has no internet connectivity - Different databases for each major iOS version, starting with iOS 10 - New iPhones added to live calibration database"
    },
    {
      "store": "apple",
      "version": "8.9",
      "released_at": null,
      "notes": "-App no longer runs in the background unless decay mode is set to average (continuous run) -Fixed problems with Save/Recall button."
    },
    {
      "store": "apple",
      "version": "9.0",
      "released_at": null,
      "notes": "-Upgraded for latest iOS and iOS devices -Now supports iPhone X and other screens -Bug fixes and stability improvements"
    },
    {
      "store": "apple",
      "version": "9.1",
      "released_at": null,
      "notes": "-Updated for latest iOS and new devices -Bug fixes and stability improvements"
    }
  ],
  "alternatives": [
    {
      "app_id": 1152352806,
      "name": "Audio Spectrum Analyzer Pro",
      "url": "https://appcorpus.com/apps/audio-spectrum-analyzer-pro-1152352806",
      "reason": "Same category + similar ratings"
    },
    {
      "app_id": 1281873790,
      "name": "Audio Spectrum Analyzer dB RTA",
      "url": "https://appcorpus.com/apps/audio-spectrum-analyzer-db-rta-1281873790",
      "reason": "Same category + similar ratings"
    }
  ],
  "evidence_summary": {
    "index_state": "S1",
    "evidence_level": 1,
    "level_label": "Live store listing",
    "indexable": true,
    "last_verified_at": "2026-08-05",
    "unknown_fields": [
      "Independent summary has not been published yet."
    ],
    "sources": [
      "App Store"
    ]
  },
  "availability_markets": {
    "live": [
      "us"
    ],
    "selected": "de",
    "note": "No LIVE observation for DE yet."
  },
  "feature_events": {
    "events": []
  },
  "features_slice": {
    "plans": [
      {
        "code": "reference-curve-files",
        "label": "Reference Curve Files",
        "kind": "unknown",
        "status": "store_listed",
        "prices": [
          {
            "storefront": "us",
            "formatted": "$9.99",
            "billing_period": null
          }
        ],
        "trial": null
      },
      {
        "code": "stc-transmission-loss",
        "label": "STC -- Transmission Loss",
        "kind": "unknown",
        "status": "store_listed",
        "prices": [
          {
            "storefront": "us",
            "formatted": "$9.99",
            "billing_period": null
          }
        ],
        "trial": null
      }
    ],
    "features": [],
    "unknown_features": [],
    "data_cutoff": "5 Aug 2026"
  }
}