Last updated: October 12, 2026
Tone Generator: Frequency Test (the “App”) is provided by Gong ChengYong (“we,” “us,” or “our”). This Privacy Policy explains how the App handles data.
This Policy applies to the iOS version of the App, its in-app purchase features, and communications you send to us through the contact email in this Policy.
The App does not create user accounts or transmit your name, contact details, location, contacts, photos, advertising identifier, usage analytics, or audio content to us. The App does not include advertising SDKs, third-party analytics SDKs, or a server operated by us to collect usage activity.
The App generates tones, sweeps, and noise locally on your device. It does not request or use microphone recording permission, record audio, or upload generated audio.
To provide its features, the App stores the following information locally on your device:
Preset names and settings you create or change, including waveform or noise type, frequency, sweep range, output level, channel, and favorite status;
Your selected App language; and
A limited cache of verified subscription or purchase entitlement, including product identifier, expiration or revocation date, and verification date.
Presets and language settings use local iOS app storage. The entitlement cache uses the iOS Keychain so the App can maintain a reasonable entitlement state when the App Store is temporarily unavailable. We cannot read or receive this local cache.
You can use “Reset Generator” in the App to clear presets and playback settings. Deleting the App normally removes data in its app container; however, Keychain items can temporarily remain after deletion depending on iOS behavior and are updated or cleared during later App Store entitlement verification.
The App offers subscriptions and a one-time in-app purchase through Apple’s App Store. Apple handles purchase, payment, refund, billing, and Apple ID information under Apple’s own terms and privacy policy. We do not receive or store your payment card number, Apple ID password, or complete billing information.
To determine whether Pro features are available, the App obtains verified purchase entitlements from Apple through StoreKit and stores only the limited local entitlement information described in Section 3.
If you email gongchengyong70@gmail.com, we receive the email address, name (if provided), and message content you choose to send. We use this information only to respond, troubleshoot, handle requests, or comply with legal obligations, and delete or anonymize it when no longer needed. Your email provider may also process your email under its own policy.
Except where required by law, necessary to protect rights or safety, or initiated by you through an Apple purchase, we do not sell, rent, trade, or share your personal data with third parties. The App itself does not transmit the local data listed in Section 3 to us.
Apple may process data related to your App Store transaction under Apple’s policies. Please review Apple’s Privacy Policy for its practices.
The App relies on iOS sandboxing, local storage, and Keychain protections. No storage or transmission method can be guaranteed completely secure, so please keep your device and operating system secure.
Because we do not operate accounts or servers that store in-App data, we generally cannot access, export, or delete presets and settings on your device. You can manage local data using the App’s reset feature or by deleting the App.
The App is not directed to children from whom parental consent is required, and we do not knowingly collect children’s personal information. If you believe a child has provided personal information to us, please contact us at the email below.
We may update this Policy to reflect feature, legal, or operational changes. The updated version will be made available in the App, on our website, or on the App Store product page and identified by the “Last updated” date. We will provide additional notice for material changes where required by law.
For questions about this Policy or privacy practices, contact:
Developer: Gong ChengYong
Email: gongchengyong70@gmail.com