# ClapReverb — Measure reverberation time > App to measure room reverberation time using sound analysis. (iPhone/iPad app by Atelier 7hz.) - Source: https://appshunter.io/ios/app/clapreverb/id1407467855 (this page in markdown: same URL + `.md`) - Developer: [Atelier 7hz](https://appshunter.io/developer/1407467854) - Category: Utilities, Business - Price: Free - Rating: 5.00/5 from 5 App Store ratings · 31 written reviews indexed - Age rating: 4+ - Requires: iOS 15.6 · 18 MB - Languages: American English, French (France) - Released: 2018-11-07 - Data updated: 2026-08-12 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/clapreverb/id1407467855/reviews.md ## What is ClapReverb? Measure the acoustics of a room... with a simple clap ClapReverb lets you instantly evaluate the reverberation time (RT) of an enclosed space — a key factor in determining a room’s acoustic quality. Is the room too echoey? Or too dry? Get the answer in just a few seconds. Simple, fast, and precise With a clean design and intuitive interface, all it takes is a quiet moment and five hand claps. Place your phone or tablet at the center of the room, wait for the signal, and clap your hands (slightly cupped palms). The app analyzes the relevant frequencies and provides a clear picture of the room's acoustics. A professional tool, accessible to everyone Whether you’re an architect, interior designer, engineer, teacher, musician — or simply curious — ClapReverb is for anyone who wants to integrate acoustics into their projects. Easily compare your results to typical reference values and decide if acoustic treatment is needed. Scientifically validated The app’s results have been verified through a rigorous experimental protocol, presented at the 26th International Congress on Sound & Vibration. Your feedback helps us improve. Questions or suggestions? Write to us at clapreverb@atelier7hz.com. We’d love to hear from you! ## Key features - Measure reverberation time - Analyze room acoustics - Simple clap-based measurement - Intuitive interface - Scientifically validated results - Compare to reference values ## Recent user reviews (10 of 31) All indexed reviews: https://appshunter.io/ios/app/clapreverb/id1407467855/reviews.md ### 1/5 — Bug *2025-04-20, version 2.3.1* Téléchargé le 20/04/25 : iPhone 15, IOS 18.4 : l’application quitte presque à chaque essai lorsqu’on touche le bouton « calculer ». ### 5/5 — Thanks for the update *2025-03-25, version 2.3.0* Ça fait plaisir de savoir que l'application est toujours développée! ### 5/5 — Great App ! *2025-03-17, version 2.2.3* Incredible results ### 1/5 — It's a shame. *2024-05-15, version 2.2.3* Good looking app, but it's not working. After the compute button is pressed it shuts down. ### 3/5 — Does not work for me *2024-03-14, version 2.2.3* I've got terrible echo/reverbation in part of my office room. The output from this app said it is fine and no problem detected. I hoped to be able to compare results before and after i install acoustic panels. ### 1/5 — Won’t work *2024-01-04, version 2.2.3* Won’t work on Apple ISO 17 ### 5/5 — iP15P *2024-01-01, version 2.2.3* Very helpful app. ### 5/5 — Parfait ! *2023-12-31, version 2.2.3* Petite application facile à utiliser. Permet de se faire une idée plus précise et surtout plus convaincante vis à vis des tiers que ce qu’on obtient "à l’oreille" : étant musicien, j’ai parfois du mal à faire comprendre l’importance de la réverbération aux "profanes". Effectivement, on a un sifflement au départ, qu’on élimine facilement en baissant le volume. Bravo et merci ! ### 1/5 — Useless app *2023-07-29, version 2.2.3* Only thing I got from this is some sore hands from claping. Doesn’t work. Don’t waste your time on this one. Not even any troubleshooting options to try and figure out why it failed so miserably. ### 1/5 — Doesn’t wait for claps *2023-01-01, version 2.2.2* Creates distortion noise out of speaker, rendering app useless. Does not work. ## Frequently asked questions about ClapReverb ### What does ClapReverb do? ClapReverb measures the reverberation time (RT) of an enclosed space using a simple clap. It analyzes the sound decay to provide insights into the room's acoustic quality, indicating if it's too echoey or too dry. ### How do I use ClapReverb? To use the app, place your phone or tablet in the center of the room. Wait for the signal, then clap your hands. The app analyzes the sound and provides a clear picture of the room's acoustics within seconds. ### Is ClapReverb accurate? Yes, the app's results have been scientifically validated through a rigorous experimental protocol. It is designed to be a precise tool for evaluating room acoustics. ### Who is ClapReverb for? ClapReverb is designed for a wide audience, including architects, interior designers, engineers, teachers, musicians, and anyone curious about the acoustic properties of a space. It helps integrate acoustics into projects or simply understand a room's sound. ### Is ClapReverb free to use? Based on the provided information, the application is free to use and does not feature in-app purchases or advertisements. ## Version history (last 5 releases) ### 2.3.3 — 2026-01-25 Compliance with the new Apple requirements. ### 2.3.2 — 2025-06-30 Fix for app crash when a Bluetooth device is connected ### 2.3.1 — 2025-03-31 Minor changes and debug (tutorial and reviews) ### 2.3.0 — 2025-03-24 - New user interface: sleek, smooth, dynamic, and responsive on all screen sizes - Changed sound notification between claps - Added usage tips for better accuracy - Minor bug fixes ### 2.2.3 — 2023-03-06 Removal of audio feedback (successful test on iPhone 7, iPhone Xs and iPhone 12) ## Apps similar to ClapReverb | App | Rating | Price | Category | | --- | --- | --- | --- | | [BuzziSpace RT60](https://appshunter.io/ios/app/buzzispace-rt60/id1613535156) | 2.7 (3) | Free | Utilities | | [NoiseLab-Lite:Noise Meter,SLM](https://appshunter.io/ios/app/noiselab-litenoise-meterslm/id1429481583) | 5.0 (3) | Free | Utilities | | [HAA CinemaTools with HAA Link](https://appshunter.io/ios/app/haa-cinematools-with-haa-link/id1180224503) | 5.0 (1) | Free | Utilities | | [ClapIR Acoustics Measurement](https://appshunter.io/ios/app/clapir-acoustics-measurement/id521153051) | 3.8 (12) | Free | Utilities | | [RevMeter Pro](https://appshunter.io/ios/app/revmeter-pro/id357421594) | 2.2 (5) | $6.99 | Utilities | | [Building Acoustics Partner](https://appshunter.io/ios/app/building-acoustics-partner/id1487977751) | — | Free | Utilities | ## Related topics [room acoustics measurement](https://appshunter.io/ios/topics/room-acoustics-measurement) · [rt60](https://appshunter.io/ios/topics/rt60) · [clapir acoustics measurement](https://appshunter.io/ios/topics/clapir-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 2026-08-12.*