# Sweep: Speaker Tuning — Frequency response, untethered > iPhone app for measuring and visualizing speaker frequency response. (iPhone/iPad app by Carl Sieber.) - Source: https://appshunter.io/ios/app/sweep-speaker-tuning/id6784438195 (this page in markdown: same URL + `.md`) - Developer: [Carl Sieber](https://appshunter.io/developer/6777791133) - Category: Utilities - Price: Free - Rating: 4.00/5 from 2 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 17.0 · 1 MB - Languages: American English - Released: 2026-07-07 - Data updated: 2026-08-26 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/sweep-speaker-tuning/id6784438195/reviews.md ## What is Sweep? See how your speakers really sound. Sweep plays a log sweep through your speaker and plots its frequency response — measured from your listening position. No laptop, no audio interface, no mic stand. Just your iPhone, a calibrated mic, and a clear picture of what you're hearing. The untethered scout between full bench sessions — the fast check from your chair you'll actually run. A minute, not an afternoon. SWEEP. CAPTURE. COMPARE. • Sweep — tap once and a 20 Hz–20 kHz log sweep plays through your speaker (the Farina ESS method the bench tools use). • Capture — a calibrated measurement mic (Dayton iMM-6C, miniDSP UMIK-1/UMIK-2/EARS, Behringer ECM8000, or any REW .cal file) or your iPhone's built-in mic records it; on-device math extracts the impulse response and plots the curve. • Compare — overlay up to 5 runs, each its own color, to see exactly what a change did. Measure, adjust, measure again. ALSO IN THE APP • Wireless output — pick any AirPlay or Bluetooth speaker as the sweep's output and measure it untethered. Sweep primes the connection first, keeps the sweep short to beat drift, and labels every wireless trace so the convenience never masquerades as the calibrated rig. • Scrub any frequency — drag the cursor; it snaps to peaks and troughs and reads frequency · dB right where you need it. Pinch to zoom into any band; hold near the edge to pan. • Target curves — overlay Harman Room, B&K, a tilt, or Room Gain as a dashed reference so you know what "good" looks like, not just what you measured. • Average or Difference — power-average two or more captures (walk the room, average the seats) or compute A − B to see exactly what a change did, both as new measurements you can keep comparing. • Real smoothing, applied after the fact — every capture keeps its full resolution; change 1/24 to 1/3-octave anytime and every trace redraws, no re-measuring. • Set levels with confidence — a built-in test tone and live meter get your output where it should be before you measure. • Share your capture — export the chart as a labeled image card: color-coded traces, an optional cursor callout, one tap to send anywhere. • Undo delete — swipe away a measurement by mistake? Undo is right there for a few seconds. HONEST BY DESIGN Sweep shows relative frequency response — the shape you need to tune speaker DSP and EQ. A time-gate isolates the direct sound; the low end reflects your room, and the chart marks that region plainly. Results are only as calibrated as the mic file you import. Wireless response is approximate — AirPlay and Bluetooth add their own small bumps and dips — and every wireless trace says so on its face. Not an SPL meter, not a full bench replacement — it names its limits up front, so you can trust its strengths. PRIVATE BY DEFAULT Everything runs on your device. No account, no signup, no cloud, no tracking, no analytics SDK. Your measurements and audio are processed entirely on iPhone and never leave it. Free. No in-app purchases, no account. Sweep is part of a family of focused instruments alongside Pull, Grip, Lean, and Level. ## Key features - Log sweep playback (20 Hz–20 kHz) - Frequency response plotting - Overlay up to 5 measurement runs - Frequency scrubbing with peak/trough snapping - Adjustable real-time smoothing - Built-in test tone and live meter - Export capture charts as images ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/sweep-speaker-tuning/id6784438195/reviews.md ### 3/5 — Has promise *2026-08-15* This looks like a really interesting app, and the price is right. Currently, however, I can’t get the sound to play over AirPlay/Bluetooth through my speakers while the app is using my phone’s microphone. Consequently, I’m measuring my phone speakers instead of my regular speakers. So, it isn’t useful for me yet. But, as this is a new app, I hope future updates will make it possible to measure with the iPhone mic while playing through AirPlay/Bluetooth. **Developer response:** Thanks for the thoughtful review - and for describing exactly what's missing, which makes it easy to prioritize. You're right: right now Sweep can't play the sweep through AirPlay or Bluetooth while recording with the iPhone mic, so it falls back to measuring the phone's own speaker instead of your actual system. Good news: that's exactly what we're building right now - the ability to play through AirPlay or Bluetooth while the iPhone mic listens, so you can measure your real speakers from your seat, no cables. It's already working in testing. Thanks again for taking the time to write this - it's exactly the kind of feedback that shapes what gets built next. ## Frequently asked questions about Sweep ### What is Sweep: Speaker Tuning? Sweep: Speaker Tuning is a utility app that allows you to measure and visualize the frequency response of your speakers directly from your listening position using your iPhone. It plays a log sweep and analyzes the captured audio to provide a clear graph of your speaker's performance. ### How does Sweep: Speaker Tuning work? The app plays a 20 Hz–20 kHz log sweep through your speakers. It then uses your iPhone's microphone or a calibrated external microphone to capture the sound. On-device processing extracts the impulse response and plots the frequency response curve. ### Can I compare different speaker settings with Sweep: Speaker Tuning? Yes, Sweep: Speaker Tuning allows you to overlay up to five different measurement runs, each displayed in a unique color. This makes it easy to visually compare the impact of adjustments you make to your speaker's DSP or EQ. ### What kind of microphone should I use with Sweep: Speaker Tuning? While the app can use your iPhone's built-in microphone, it recommends using a calibrated USB-C microphone such as the Dayton iMM-6C for more accurate results. The accuracy of the measurements depends on the calibration of the microphone file you import. ### Does Sweep: Speaker Tuning have ads? No, Sweep: Speaker Tuning is completely ad-free. It is designed to be a focused instrument and does not contain advertisements. ### Is Sweep: Speaker Tuning available on Android or other platforms? Currently, Sweep: Speaker Tuning is only supported on iPhone. The app is designed to run entirely on your device and does not require an account or cloud services. ### How often is Sweep: Speaker Tuning updated? Sweep: Speaker Tuning was last updated on July 7, 2026, with version 1.2. The developer, Carl Sieber, focuses on creating specialized instruments, suggesting updates will likely focus on refining existing features and ensuring compatibility. ### What are the privacy features of Sweep: Speaker Tuning? Sweep: Speaker Tuning is private by default. It runs entirely on your device, requires no account or signup, and does not use cloud services, tracking, or analytics SDKs. Your measurements and audio are processed and never leave your iPhone. ## Version history (last 5 releases) ### 1.5 — 2026-08-25 Untethered, literally. • Wireless output — send the sweep to any AirPlay or Bluetooth speaker and measure it from where you sit. A short warm-up chuff primes the connection, then the sweep plays. • Honest labels — every wireless trace is marked, right next to the uncalibrated badge, so you always know how a curve was made. Tap either badge for a plain-English explanation. • Smarter under pressure — the short sweep is selected automatically over wireless, a just-switched speaker gets extra settling time, and a sweep that doesn't fully arrive is caught and reported instead of plotted. • A bigger measurement library — tap the handle under the list to expand it over the chart; tap again to bring the chart back. Scroll the collapsed list too. • Capture range (Gated / Full range) moved to Settings, alongside the time gate it belongs with. • Full support for smaller iPhones, and a consistent panel layout across every screen size. ### 1.4.1 — 2026-08-19 Capture your way: choose Gated (ignores room reflections) or Full range (includes them) right on the Measure sheet. Settings got tidier too. Thanks for measuring with Sweep. ### 1.4 — 2026-08-10 Compare like a pro: overlay a Harman or B&K target curve, average multiple positions, or compute A − B between two captures. Pinch to zoom the chart. Change smoothing anytime — every capture keeps its full resolution. ### 1.3 — 2026-07-17 Bring your own mic. Sweep now reads miniDSP UMIK-1, UMIK-2, EARS, Behringer ECM8000, and REW-style .cal files — alongside the one-cable Dayton iMM-6C. Chart scrubbing feels quicker too. Thanks for measuring with Sweep. ### 1.2 — 2026-07-07 No release notes. ## More apps by Carl Sieber - [Pull: Acceleration Tracker](https://appshunter.io/ios/app/pull-acceleration-tracker/id6777791130) - [Lean: Inclinometer](https://appshunter.io/ios/app/lean-inclinometer/id6780365308) - [Level: Sound Level Meter](https://appshunter.io/ios/app/level-sound-level-meter/id6781562419) - [Grip: G-Force & Cornering](https://appshunter.io/ios/app/grip-g-force-and-cornering/id6781833028) All apps by Carl Sieber: https://appshunter.io/developer/6777791133 --- *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.*