# Home Theater SPL > Mobile decibel meter for home theater surround sound calibration. (iPhone/iPad app by J.S. Technology Ltd..) - Source: https://appshunter.io/ios/app/home-theater-spl/id1005066204 (this page in markdown: same URL + `.md`) - Developer: [J.S. Technology Ltd.](https://appshunter.io/developer/586233093) - Category: Utilities, Entertainment - Price: $0.99 - Rating: 1.00/5 from 1 App Store ratings · 2 written reviews indexed - Age rating: +4 - Requires: iOS 17.0 · 9 MB - Languages: American English - Released: 2015-06-24 - Data updated: 2026-08-22 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/home-theater-spl/id1005066204/reviews.md ## What is Home Theater SPL? Home Theater SPL Information   Professionals use SPL meters to calibrate audio reproduction systems in cinemas, so why shouldn’t Home Theaters or Home Cinemas owners use them too? Now the very same SPL meter that’s in our TestCard ProHD app is available separately.   An SPL or “decibel” meter is an essential tool when setting up surround sound systems.   Home Theater SPL a solution for calibrating the audio level of surround sound systems within the home without the need for additional equipment. Our app TestCard ProHD is the innovative means to calibrating your screen and audio to ensure a consistent and correct representation of display media and surround sound and includes an SPL meter. If you wish to calibrate both audio and visual aspects of your Home Theater then please consider TestCard ProHD.   Surround Sound Level Setting.   An SPL, or “Decibel” meter, is a sound power meter to assist with setting the speaker levels.   As speakers have different sensitivities they produce different levels of audio.   One may be louder or quieter than another, and how the room is laid out will also have an effect, but the goal is to have similar levels from all speakers reaching the viewing position.   To create that “centered sound stage” it’s important to calibrate the system.   While an approximation may be possible by ear, it is best done with an SPL meter.   A second factor to consider is simply that it also verifies that each speaker is in the correct position!   While working on an initial installation it is imperative to verify that audio is emanating from the selected speaker.   Select SPL on the main screen of Home Theater SPL to launch the meter.   Turn the iPhone or iPad so that the bottom microphone is pointing upwards and hold at ear level.   The scale is fixed, and the main black needle gives a slow average response as desired.   A red needle is provided for peak noise level information and is not required during calibration. Start with the front left speaker and allow it to set the benchmark level; the target for all other speakers to be set to.   Typically the audio will be in the 70-80dB range and as a guide 70dB is marked in red on dial.   With Home Theater SPL it is possible to note the current sound level by tapping on respective speaker, making it easier to recall where individual speakers were.   Move to the center speaker and adjust its level to closely match the first.   It is normal for amplifiers to increase or decrease sound levels by 1dB increments and it may not be possible to get an exact match.   Move to the next speaker in the list and repeat.   Variance of 1 or 2dB during calibration is normal, but it will settle around a value.   Some systems will have 5 speakers and some will also have the LFE, or bass effects, speaker to give the “0.1” to make 5.1 audio.   With the SPL meter there are 7 main speakers shown with one LFE to make 7.1.   With a 5.1 system the Mid speakers will not be present and therefore can be skipped. To check it’s always advisable to run round checking the speaker levels again, perhaps even adjusting the initial left speaker if it was not possible to set others within the range allowed by the amplifier.   When complete ensure that you save the settings within the amplifier if they’re not automatically saved.   For reference a screen shot of the SPL meter on Home Theater SPL can be taken to record any stored audio level by pressing the camera button. ## Key features - Decibel meter for audio calibration - Set surround sound speaker levels - No additional equipment needed - Peak noise level indicator - Supports 5.1 and 7.1 systems ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/home-theater-spl/id1005066204/reviews.md ### 1/5 — replaces a pencil and paper *2025-12-01* I would have thought the app would run one channel at a time to allow independent separate measurements of each speaker SPL. Disappointing ### 5/5 — Excellent utility *2015-11-14* My home cinema setup wasn't properly calibrated and I was feeling not quite satisfied with the experience. So I thought I'd see if any iPad App existed and was pleased to find this at a reasonable price! Did the job excellently and now my system is impressing me again :) **Developer response:** Thank you for your kinds words! We love our home cinema too so wanted an app which was simple and targeted specifically for surround sound calibration. ## Frequently asked questions about Home Theater SPL ### What is Home Theater SPL used for? Home Theater SPL is a decibel meter app designed to help users calibrate the audio levels of their surround sound systems. It allows for setting speaker levels accurately to achieve a balanced and centered sound stage without needing external equipment. ### How do I use Home Theater SPL to calibrate my speakers? To use Home Theater SPL, point your device's microphone upwards and hold it at ear level. Start with one speaker to set a benchmark level (typically 70-80dB), then adjust other speakers to match this level. The app helps you note current sound levels for easier recall and adjustment. ### Does Home Theater SPL require any extra hardware? No, Home Theater SPL is designed to function without any additional equipment. It utilizes your iPhone or iPad's built-in microphone to measure sound levels for calibration purposes. ### What is the price of Home Theater SPL? Home Theater SPL is a paid application, available for $0.99. This one-time purchase provides access to its audio calibration features. ### What devices is Home Theater SPL compatible with? Home Theater SPL is compatible with both iPhone and iPad devices. It is suitable for users who own Apple mobile devices and have a home theater setup. ### How often is Home Theater SPL updated? The latest version of Home Theater SPL is 1.26, and it was last updated on October 27, 2024. This indicates that the app receives periodic updates to maintain functionality and compatibility. ### What is the age rating for Home Theater SPL? Home Theater SPL has an age rating of 4+. This means it is considered suitable for users of all ages, with no content restrictions. ### Does Home Theater SPL have ads? No, Home Theater SPL does not contain advertisements. As a paid application, it offers an ad-free experience for users focused on calibration. ## Version history (last 5 releases) ### 1.26 — 2024-10-27 Service update for newer version of iOS. Keeping the app fresh. ### 1.25 — 2023-01-17 Service update for newer version of iOS. Keeping the app fresh. ### 1.24 — 2021-11-01 Service update for later versions of iOS to keep the build fresh. ### 1.22 — 2019-08-25 General update for iOS. ### 1.21 — 2017-10-09 Updates for iOS. Added missing graphic from iPad main screen. ## Apps similar to Home Theater SPL | App | Rating | Price | Category | | --- | --- | --- | --- | | [Know My IP](https://appshunter.io/ios/app/know-my-ip/id6645736200) | — | $1.99 | Utilities | | [AudioCalc](https://appshunter.io/ios/app/audiocalc/id294447976) | 3.0 (1) | $2.99 | Utilities | | [Ruko GIM](https://appshunter.io/ios/app/ruko-gim/id6746407205) | 5.0 (1) | Free | Utilities | | [Tagalog Dictionary - Eng Tag](https://appshunter.io/ios/app/tagalog-dictionary-eng-tag/id1495286854) | — | $1.99 | Utilities | | [livetoolkit](https://appshunter.io/ios/app/livetoolkit/id290056069) | 2.0 (2) | $3.99 | Utilities | | [sakekas](https://appshunter.io/ios/app/sakekas/id1527877073) | — | Free | Utilities | ## More apps by J.S. Technology Ltd. - [MetroBaby](https://appshunter.io/ios/app/metrobaby/id586233090) - [TestCard ProHD 4k](https://appshunter.io/ios/app/testcard-prohd-4k/id705103583) - [Loyalty Store](https://appshunter.io/ios/app/loyalty-store/id841473784) - [PIN Store](https://appshunter.io/ios/app/pin-store/id874458888) All apps by J.S. Technology Ltd.: https://appshunter.io/developer/586233093 ## Related topics [home theater spl](https://appshunter.io/ios/topics/home-theater-spl) · [home theater](https://appshunter.io/ios/topics/home-theater) · [home theater ear candy](https://appshunter.io/ios/topics/home-theater-ear-candy) --- *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 2026-08-22.*