# EarWitness: Loop Detector — Catch your sound machine lying > Detects repeating audio loops in sound machines and ambient recordings. (iPhone/iPad app by Timothy Nesbitt.) - Source: https://appshunter.io/ios/app/earwitness-loop-detector/id6792819386 (this page in markdown: same URL + `.md`) - Developer: [Timothy Nesbitt](https://appshunter.io/developer/6775325793) - Category: Utilities, Entertainment - Price: Free - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 17.0 · 3 MB - Languages: American English - Released: 2026-07-30 - Data updated: 2026-08-08 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/earwitness-loop-detector/id6792819386/reviews.md ## What is EarWitness? The app that catches your sound machine lying. Most white-noise machines and sleep-sound apps don't generate sound, they play a short recording on an endless loop. Your brain is a pattern-recognition machine: even when you can't consciously hear the seam, it senses the repetition, and the sound stops soothing and starts nagging. EarWitness settles the question with measurement, not marketing claims. HOW IT WORKS Place your iPhone near any sound source and press START. EarWitness captures audio through the microphone in raw measurement mode, bypassing iOS voice processing, and analyzes it in real time using normalized cross-correlation. If the sound repeats, it finds the loop and reports its exact period. If it doesn't, you'll know your noise is truly continuous. A loop is only confirmed after it repeats at least twice, so a single chance match never triggers a false verdict. NOT JUST WHITE NOISE EarWitness detects any repeating audio, as long as the full loop fits within one session and repeats at least twice. Sleep machines, ambient tracks, HVAC hum, mechanical cycling, "seamless" background loops, if it repeats, EarWitness hears it. ANALYZE A FILE YOU ALREADY HAVE (NEW) Point EarWitness at an existing recording and run it through the same detector. Useful for checking audio you captured elsewhere, and, like everything else, processed entirely on your device. KEEP THE EVIDENCE (NEW) When a loop is found, export it as an M4A, or save the full raw take as a WAV, handy for sound designers verifying their own exported loops, or for anyone who wants to hold onto a copy. A READOUT, NOT A LULLABY EarWitness is a measurement instrument. It shows you a clean, honest readout, the detected period, the correlation strength, the confirming peaks, not a cozy soundscape. If you want the truth about a sound, this is the tool. (For the sound itself, keep your machine.) PRIVATE BY DESIGN All analysis happens on your device. Nothing is uploaded, no account is required, and the app collects no data. WHO IT'S FOR • Light sleepers testing whether their sound machine is part of the problem • Parents evaluating a nursery machine before trusting it all night • Shoppers checking "non-looping" claims before or after buying • Reviewers who want a measured loop length instead of a guess • Sound designers verifying their own ambient loops play back clean • Anyone haunted by a sound they swear keeps repeating Stop wondering. Start measuring. ## Key features - Real-time audio analysis - Detects repeating sound patterns - Measures exact loop periods - Analyzes existing audio files - Exports loop data (M4A, WAV) - On-device processing for privacy ## Frequently asked questions about EarWitness ### Does EarWitness have ads? No, EarWitness is completely ad-free. It does not contain any advertisements, allowing for an uninterrupted analysis experience. ### How accurate is EarWitness in detecting loops? EarWitness uses normalized cross-correlation to analyze audio in real time. A loop is only confirmed after it repeats at least twice, ensuring a single chance match does not trigger a false verdict. ### Can EarWitness analyze audio files I already have? Yes, EarWitness has a feature to analyze existing recordings. You can point the app at a file you've captured elsewhere and run it through the same detector entirely on your device. ### What kind of audio can EarWitness detect loops in? EarWitness can detect any repeating audio, including sleep machines, ambient tracks, HVAC hum, mechanical cycling, and 'seamless' background loops, as long as the full loop fits within one session and repeats at least twice. ### What information does EarWitness provide about detected loops? EarWitness provides a clean readout including the detected loop period and the correlation strength, along with confirming peaks. It focuses on objective measurement rather than subjective soundscapes. ### Is my audio data safe with EarWitness? Yes, EarWitness is designed with privacy in mind. All analysis happens on your device, nothing is uploaded, no account is required, and the app collects no data. ### What devices does EarWitness support? EarWitness is currently supported on iPhone devices. The app utilizes the iPhone's microphone for its audio analysis capabilities. ### How often is EarWitness updated? EarWitness was last updated on July 30, 2026, with version 1.0. Future updates will likely focus on refining its detection algorithms and potentially adding new analysis features. ## Version history (last 1 release) ### 1.0 — 2026-07-30 No release notes. ## More apps by Timothy Nesbitt - [DailyChroma](https://appshunter.io/ios/app/dailychroma/id6775325791) All apps by Timothy Nesbitt: https://appshunter.io/developer/6775325793 --- *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 2026-08-08.*