ONGAI - Decibel Meter & Noise

"The footsteps from the floor above are too loud..."
"The pet barking or instrument sounds from the next room are bothering me..."
"I want to consult the management company or the police, but I don't have any evidence..."

To everyone suffering from noise troubles caused by everyday sounds: "ONGAI" is a smart decibel meter app that does more than just measure noise. It highlights hard-to-capture sounds like heavy heel strikes and records decisive noise events. Furthermore, with the Automatic Noise Monitoring & Recording feature available in the Pro Plan, you can also use it to check your snoring or sleep talking at night for health management.


[Key Features]

◆ Free Plan
- Real-time noise measurement (dB meter)
- Manual noise recording & history saving
- Audio playback filtering (Normal / Footsteps)
- Noise level trend graph (Last 3 days)

◆ Pro Plan (One-time purchase)
- Automatic noise monitoring & recording
- Pre-recording (capture sound before detection)
- Scheduled timer monitoring
- Unlimited history graphs
- Evidence report export (PDF/CSV)


[Why Choose ONGAI?]

■ 1. Footstep Filter for "Structure-Borne Sounds" (Free/Pro)
Everyday noises from footsteps (heavy heel strikes) are "structure-borne sounds" that transmit vibrations. Even if they feel highly annoying, they often measure only around 50 dB on standard decibel meters (similar to a quiet office). At night, even a 40 dB structure-borne vibration can be deeply disturbing.
Standard recorders often fail to capture these low-frequency sounds clearly. ONGAI's "Footstep Filter" cuts high-frequency noise and emphasizes low-frequency tones to make these footsteps much easier to hear.

■ 2. Automatic Noise Monitoring & Recording (Pro)
ONGAI automatically starts recording when noise exceeds your preset dB threshold, and stops when it drops back down.
Fleeting noises like sudden footsteps or pet barks are hard to record manually because they stop by the time you open your phone. Automating this process makes gathering evidence effortless.
Choose between "Normal" (full range) or "Footstep Optimized" (cuts high frequencies to trigger specifically on structure-borne vibration) modes.

* Pre-recording: Saves audio from a few seconds before the threshold is exceeded, so you don't miss the start of the sound.
* Scheduled Timer: Specify monitoring windows (e.g., 23:00 to 6:00) to collect sleep-time evidence or check your own snoring/sleep talking.

■ 3. Evidence Report Export (Pro)
Export PDF/CSV reports detailing dates, times, decibel levels, and durations to serve as structured records for landlords, management, or authorities.


[Privacy-First Design]

All recorded audio and decibel data are processed and stored strictly on your device (locally). No data is ever sent to external servers, ensuring complete privacy even offline.


[Recommended For]

- Anyone troubled by noise from upstairs or adjacent rooms.
- Those wanting to capture sudden, brief noises without missing a second.
- Those concerned about data privacy and online leaks.
- Anyone needing objective evidence to present to landlords, management, or authorities.


Reclaim a quiet, peaceful life. Start accurately recording your environment with "ONGAI."


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