Privacy Policy

Stadium Decibel Meter · com.kaptanoglu.stadium.decibel · last updated 10 October 2026

Who is responsible

The app is published by Boring Cat (Ali Kaptanoğlu). For any question about this policy or about your data, write to ongorunet@gmail.com.

Microphone

The app needs microphone access to work: it reads the audio signal, calculates its loudness in decibels, and throws the signal away. The audio stream is processed in memory, in 100 millisecond windows, and is never written to storage or sent anywhere. Only the resulting decibel values (peak, sustained and average) leave the device.

The microphone is opened only while the meter is on screen and is closed as soon as the app goes to the background.

Location

Location is optional. If you allow it, the app uses your coordinates for two things:

• to suggest the stadium nearest to you from the built-in catalogue (this happens on the device, offline);
• when you submit a record attempt, to check whether you were inside the stadium. Attempts measured at the venue get a “verified” badge on the leaderboards.

When you submit an attempt, the coordinates and the reported GPS accuracy are sent with it and stored alongside that attempt. If you do not grant location access, you can still measure and still submit — the attempt is simply marked unverified.

What is sent when you submit an attempt

• the decibel values of the attempt (peak, sustained, average), its duration and the number of measurement windows;
• the calibration offset you set in Settings;
• the stadium you selected;
• your coordinates and GPS accuracy, if location is allowed;
• the nickname you chose, which is shown publicly on the leaderboards;
• an anonymous identifier generated on your device the first time the app runs;
• the platform (Android or iOS) and the app version.

The anonymous identifier is a random value. It is not your advertising ID, not your Android ID and not tied to your Google account. It exists so that the leaderboard can keep one best result per person. Clearing the app’s data or uninstalling it discards that identifier; a new one is generated on the next run and your old entries can no longer be linked to you.

What is public

Leaderboard entries are public inside the app: the nickname, the decibel value, the stadium, the country and whether the reading was verified at the venue. Your exact coordinates are never shown to other users — only the distance check result (verified or not).

Where the data is stored

Submitted attempts are stored in a Cloudflare D1 database operated by us and served by Cloudflare, Inc. Cloudflare processes the request as our infrastructure provider and may log technical request data such as IP address for abuse prevention, in line with its own policy. We keep attempts for as long as the leaderboards exist.

What we do not do

• No advertising and no advertising identifier. The app does not request the AD_ID permission.
• No third-party analytics, crash reporting or tracking SDKs.
• No contacts, photos, files, calendar or account access.
• No data is sold or shared with data brokers.

Children

The app is not directed at children under 13 and does not knowingly collect data from them. Anyone can use it, but nothing in it is aimed at children.

Deleting your data

Uninstalling the app removes everything held on your device, including the anonymous identifier. To have your submitted attempts removed from the leaderboards, email ongorunet@gmail.com from any address with your nickname and roughly when you played; we will delete the matching entries. You can also request deletion without reinstalling the app.

A note on the readings

A phone microphone is not a Class 1 sound level meter. The readings are an estimate for fans, not an official measurement, and they are not recognised by Guinness World Records.

Changes

If this policy changes, the date at the top of this page changes with it. Material changes will also be described in the app’s release notes.