DeciLevel: Noise & Tilt Meter

DeciLevel is a decibel meter, noise meter and bubble level for Android. It measures noise (dBA) and level or slope (°, %, mm/m) with your phone's microphone and accelerometer. It has no ads and no subscription. It never stores or sends audio; only sound level numbers are saved on your device. You can turn an overnight log into a PDF report for reference, and compare it with the limits in South Korea's inter-floor noise rule. DeciLevel does not replace a certified sound level meter, and its readings are not a legal determination. WHO IT'S FOR - People who want to know when neighbor noise happens and how often, before talking to a neighbor or landlord - Anyone who wants an all-night noise log instead of sound meter screenshots - People leveling shelves or frames, or checking a drain slope NOISE MEASUREMENT - Live noise: shows the current sound level in dBA. - Stats and graph: shows the last 60 seconds with average Leq, max and min. - Time response: choose Fast or Slow. - Microphone calibration: enter a reference meter reading to match your phone. - Noise floor check: see how low this phone can read in a quiet place. OVERNIGHT LOG AND REPORT - Overnight noise log: keeps recording sound level numbers with the screen off, with a notification while it runs. - Relative results: shows your typical level, moments more than 15 dB above it, and the busiest hour. - Moments list: collects the time and level of each loud moment. - That was me: mark your own noise or remove it from the list. - Summary card: share the result as one image. - PDF report: a reference document you can bring to a consultation. - South Korea comparison: in South Korea, compares day and night impact and airborne noise with the rule's limits and labels each result Possible exceedance, No exceedance found, Inconclusive or No data. Outside South Korea it is off unless you turn it on, and it may not be the standard where you live. TILT METER: LEVEL AND SLOPE - Bubble level (spirit level): lay your phone flat to see X and Y tilt. - Edge mode (inclinometer): stand your phone on its side to measure an angle, and set a zero reference for relative angles. - Units: shows °, %, 1:n and mm/m together. - Two-point calibration: measure, rotate 180° in place and measure again to cancel sensor error. - Hold: freeze a reading with the button or a volume key, or turn on auto hold. - Slope calculator: enter a length to get the height difference and how far you are from a target slope. LIFETIME UNLOCK Live noise measurement and level and slope measurement have no limits. Your first overnight log can run up to 12 hours, later logs up to 2 hours, and you can create one PDF. A one-time lifetime unlock gives you overnight logs up to 24 hours, PDF and CSV export, night comparison, C-weighted measuring, a widget and unlimited history. It is not a subscription, and you can ask for a refund within 7 days of purchase. FAQ Q. Does it record audio? No. The microphone signal is turned into a sound level number in memory and the audio is discarded right away. Only dB values and times stay on your device. Q. Can I use the readings as evidence? No, they are not a basis for a legal determination. A phone is not a certified sound level meter. Use reports as reference notes on when noise happened. For an official measurement, contact your local authority. Q. How accurate is a phone sound meter? It varies by device. DeciLevel shows calibration status on screen and in reports. Treat uncalibrated values as estimates. Q. Do I need an account? No. Your records are encrypted and stored on this device. When you change phones, move them with a ZIP backup, PDF or CSV. PERMISSIONS AND PRIVACY The microphone is used only to calculate sound levels, and notifications only show a running log. Measurement data is not sent anywhere. The South Korea comparison is for reference only, and DeciLevel is not affiliated with any government agency. Works on Android 8.0 or later, in 27 languages.

DeciLevel is a decibel meter, noise meter and bubble level for Android. It measures noise (dBA) and level or slope (°, %, mm/m) with your phone's microphone and accelerometer. It has no ads and no subscription. It never stores or sends audio; only sound level numbers are saved on your device. You can turn an overnight log into a PDF report for reference.