Privacy Policy - Frequency Generator

Effective date: September 19, 2026

This Privacy Policy describes how the Android application Frequency Generator (package frequencygenerator.tonegenerator.hzsound, "the App"), published by FightTech, handles information.

1. Summary

Frequency Generator creates tones on your device. It does not use the microphone, does not record anything, and needs no account. The App shows no ads and does not access the Android Advertising ID. It uses Google Firebase Analytics and Firebase Crashlytics for anonymous usage statistics and crash reports, and Google Play Billing for Premium (monthly or yearly subscription, or a one-time lifetime purchase). You can turn analytics and crash reporting off in Settings.

2. Audio

All tones are synthesised on your device and played through its speaker or connected headphones. The App does not request microphone access and never records or uploads audio. A WAV file is created only when you use Export, and it is saved or shared only where you choose.

3. Data stored on your device

The App stores your settings on the device: last frequency, waveform, volume, step size, channel, the analytics opt-out switch and your Premium status cache. This data stays in the app's private storage on your device and is deleted when you uninstall the App.

4. Analytics and crash reporting

The App includes Google Firebase Analytics and Firebase Crashlytics. Because those libraries are present, the App declares the INTERNET permission. What is sent:

• Feature usage - screens opened, tone started or stopped, preset, waveform and sweep used, paywall shown and purchase result.
• Technical values - app version, Android version and device model.
• Firebase also attaches its own standard app-instance identifier, app version, device model, country and language.
• Crash reports - stack traces and device state at the moment of a crash.

No audio, recordings or audio-derived content is ever sent.

You can disable analytics and crash reporting at any time in Settings → Share anonymous usage & crash reports. When it is off, the App stops sending analytics and crash reports.

5. Data collection, sharing and third parties

• We do not collect any personal information (no names, email addresses, contacts, files, or photos).
• We do not sell or share personal data for advertising.
• Google Play processes purchase history and payment transactions. The App does not receive or store card numbers or other payment credentials.
• Firebase Analytics and Crashlytics process analytics and crash data; see the Firebase privacy documentation and Google Privacy Policy.
• All audio work happens on-device; network access is used only by analytics, crash reporting and Google Play Billing.

6. Purchases

Premium is offered as an auto-renewing monthly or yearly subscription or as a one-time lifetime purchase. Payments, renewals, refunds and cancellations are handled by Google Play under your Google account. The App only receives the purchase status needed to unlock features. You can cancel a subscription at any time in Google Play → Payments & subscriptions.

7. Permissions

• Billing - used by Google Play Billing to buy and restore Premium.
• Internet / network state - used by Firebase and Google Play Billing.

8. Children

The App is intended for a general audience and is not directed at children. It collects no personal information from any user, including children.

9. Changes to this policy

If this policy changes, the updated version will be published at the same address with a new effective date.

10. Contact

If you have any questions about this Privacy Policy, contact us at: trunghieu4121993@gmail.com