Support & FAQ

QuietScore is an iOS app that measures how well your doors and windows block sound. You place a Bluetooth or AirPlay speaker inside a room, stand outside with your phone, and the app measures how much quieter it gets when you close the door. You get a Sound Isolation Score from 0 to 50.

An iPhone or iPad running iOS 26 or later, and any Bluetooth or AirPlay speaker. That's it — no special equipment, no calibration, no acoustic engineering degree.

The app needs a sound source inside the room and a microphone outside. Since your phone's speaker and mic are in the same device, it can't measure sound traveling through a barrier. The Bluetooth or AirPlay speaker acts as the sound source on the other side of the door.

Yes — any A2DP-compatible Bluetooth speaker or AirPlay speaker works. That covers virtually all modern wireless speakers. No special setup or calibration needed.

The app plays test tones through the Bluetooth or AirPlay speaker at four frequencies (125 Hz, 500 Hz, 1 kHz, and 4 kHz). It measures the sound level with the door open (baseline), then again with the door closed. The difference tells you how much sound the barrier blocks.

About 30 seconds for the actual measurement, plus a minute or two for setup. You can go from launch to score in under 2 minutes.

Not completely silent, but reasonably quiet. The app automatically checks that ambient noise is at least 15 dB below the test tone. If it's too noisy, the app will let you know and suggest fixes.

The app uses your phone's motion sensors to detect movement. If you move more than about 10 cm (4 in) during a measurement, you'll get a warning. This helps ensure accurate, repeatable results.

Changing your phone's volume during a measurement would affect the results. The app monitors the volume slider and warns you if it detects a change. Note: if your speaker has its own independent volume knob, the app can't detect changes on the speaker itself.

The score (0–50) tells you how many decibels of sound your door or window blocks, weighted toward speech frequencies. Higher is better. The score comes with a privacy rating: Poor (below 20 — speech clearly audible), Moderate (20–29 — loud speech partially heard), Good (30–39 — speech faintly audible but not intelligible), or Excellent (40+ — complete speech privacy).

It depends on the door type. A hollow interior door typically scores 20–25 (Moderate). A solid-core door scores 28–32 (Good). An acoustic or soundproof door can score 40+ (Excellent). Single-pane windows usually score below 20 (Poor).

The Sound Isolation Score is comparable to professional STC (Sound Transmission Class) ratings, but it's not identical. STC is measured in a lab across 16 frequency bands with specific calculation rules. QuietScore uses a 4-frequency approximation weighted toward speech privacy. We use our own name to be upfront that this is a practical estimate, not a certified lab test.

Small variations (1–2 dB) between measurements are normal and expected — even professional lab tests have some variability. Larger differences may be caused by different ambient noise levels, phone position, speaker volume, or environmental changes. For the most reliable comparison, try to replicate the same setup each time.

Currently QuietScore measures open/close barriers — doors and openable windows. You can't measure a wall or fixed window because there's nothing to open and close for the two-phase measurement. A two-position method for walls and floors is planned for a future update.

Doors (hollow interior, solid-core, acoustic/soundproof), openable windows (casement, sliding), and a custom/other option for anything else. Selecting a barrier type is optional but helps you see the expected score range for comparison.

The scanner (Home tier and above) turns your phone into a sound leak detector. Hold it upside-down and slowly trace along door edges, window frames, or wall seams. The app shows real-time sound levels, highlighting exactly where sound leaks through. You can use it with the Bluetooth or AirPlay speaker playing pink noise, or in passive mode to detect where external noise enters.

Yes — tap any saved room and choose "Take a new QuietScore." The app tracks your measurement history and shows whether each new score is better, worse, or unchanged (within 2 dB). This is great for checking if your soundproofing upgrades are working.

Home, Studio, and Business users can generate professional PDF reports with frequency breakdown, scores, and recommendations. Studio adds raw dB data and per-measurement notes to reports. Business users can add their company logo and branding, and generate multi-room reports. Reports can be shared via email, AirDrop, or saved to Files.

QuietScore has four tiers: Free gives you the core Sound Isolation Score, privacy rating, room saving, and retake measurements. Home ($4.99/mo or $38/yr) adds frequency analysis, leakage scanner, room notes, and PDF reports. Studio ($9.99/mo or $77/yr) adds external mic support, Advanced Mode with raw dB readings, per-measurement notes, and raw data in PDF reports. Business ($19.99/mo or $149/yr) adds your company logo on reports, multi-room reports, and custom metadata fields.

If you just want to know how your door rates, Free is all you need. Home is the best value for homeowners — frequency breakdown, leakage scanner, and PDF reports cover most use cases. Studio is for enthusiasts who want raw data, external mic support, and detailed notes on every measurement. Business is for acoustic consultants and contractors who need branded multi-room reports.

Advanced Mode (Studio and above) shows the raw decibel readings behind your score — the actual dB levels at each frequency for both sides of the door. It's useful for diagnosing specific problem frequencies or comparing with professional equipment. The raw data also appears in Studio and Business PDF reports.

No. All measurement data is stored locally on your device. Nothing is uploaded to our servers or any cloud service. If you delete the app, your data is permanently removed.

We use TelemetryDeck for privacy-friendly analytics. It collects no personal data — no names, emails, IP addresses, or device identifiers. We see aggregate usage patterns to improve the app, but we cannot identify individual users.

Common reasons: the door has gaps at the bottom or edges (even small gaps drastically reduce isolation), the speaker volume was too low for accurate measurement, there was background noise during the test, or the door type naturally has lower isolation than expected. Try the leakage scanner to find where sound is getting through.

The biggest improvements usually come from sealing gaps: add a door sweep at the bottom, replace worn weatherstripping, and check for gaps around the frame. For more significant improvement, upgrade to a solid-core door. Visit our guide at soundprooftest.com for detailed soundproofing tips.