Sound level meter, chromatic tuner, and reference tones. Pay once.
About Acuity: Sound Meter & Tuner
Acuity: Sound Meter & Tuner is a tools app developed by KUROKI STUDIO.
Download Statistics
Acuity: Sound Meter & Tuner has been downloaded 1 times. In the last 30 days, the app was downloaded 1 times.
User Ratings
The app has no ratings yet.
App Information
Acuity: Sound Meter & Tuner is FREE to download. The APK download size is 28.07 MB. The latest version available is 1.0.0. The last update was on August 11, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on Google Play 1 week ago.
Description
Acuity is a sound level meter, chromatic tuner, and reference tone generator for Android. Measure ambient noise, tune your instrument, or produce clean reference frequencies at a known pitch.
SOUND LEVEL METER - A-weighted decibel readings from your device microphone - Live 60-second time-series chart - MIN, MAX, AVG, and L_eq statistics - Hold and reset controls for capturing a specific reading - Sound reference guide showing where common environments fall on the dB(A) scale, plus hearing-safety guidance
CHROMATIC TUNER - Real-time pitch detection from A2 to A6 - Cents-off indicator with clear sharp and flat direction - Preset chips for guitar, bass, ukulele, and violin - Adjustable A4 reference pitch (Pro)
REFERENCE TONE GENERATOR - Clean sine tones for equipment testing and ear training - 1 kHz preset included in the free tier - Full library at 100 Hz, 1 kHz, 4 kHz, plus chromatic notes A2 to A6 (Pro) - Loud-volume warning past hearing-safe thresholds - Hidden mini keyboard easter egg
PRO UNLOCK ($4.99, one-time) - Analog gauge and dual-display dial modes - C-weighting and Z-weighting frequency curves - Save unlimited sessions to a local database - Export sessions and full history as CSV - Microphone calibration wizard with three methods: reference SPL, manual offset, and tone-gen self-check - Full tone generator library - Adjustable tuner reference pitch
BUILT BY KUROKI STUDIO Kuroki Studio builds small, focused apps that pay once and stay yours. No subscriptions. No accounts. Each app does one job and gets out of your way.
PRIVACY Everything Acuity does runs on your device. Sound is processed sample-by-sample in real time to compute decibel readings and detect pitch. No audio file is written to your device or sent anywhere.
IMPORTANT Acuity is a consumer-grade instrument. Readings depend on your device's microphone and are best-effort. Not certified for occupational, medical, or legal use. For regulated measurement, use a Type 1 or Type 2 sound level meter calibrated to a hardware standard.
Acuity is a sound level meter, chromatic tuner, and reference tone generator. Measure ambient noise, tune your instrument, or produce clean reference tones.
Free tier: meter, tuner, and 1 kHz reference tone. One-time $4.99 unlock adds the analog dial, C and Z weighting, session recording and CSV export, mic calibration, full tone library, and adjustable A4.
Everything runs on your device. No subscriptions, no accounts, no analytics.
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