Voice FX
Privacy Policy
TL;DR: Your recordings never leave your device. Voice FX sends only anonymous crash reports and usage statistics — no personal data, no advertising ID. No ads, no account.
Effective Date: November 15, 2025
Last Updated: September 28, 2026 (this version applies from app version 1.5.0)
1. Introduction
Welcome to Voice FX ("we," "our," or "the app"). This Privacy Policy explains how Voice FX handles your information. The short answer: your recordings and your personal data stay on your device. The only information we receive is anonymous crash reports and usage statistics, described in section 3.
2. Information We DO NOT Collect
Voice FX is designed with privacy as a core principle. We do not collect, store, process, or transmit:
- Audio recordings - All recordings stay on your device
- Text you type - Text-to-speech input is processed on your device only
- Personal information - No names, emails, phone numbers, addresses, or contacts
- Location data - We never access your location
- Advertising identifiers - Advertising ID collection and ad personalization are switched off
- Account data - There is no account and no sign-in
- Advertising data - There are no ads, period
3. Crash Reports and Usage Statistics
Since version 1.5.0, Voice FX uses Firebase Crashlytics and Google Analytics for Firebase, services provided by Google LLC, to understand crashes and how the app's features are used.
What is collected:
- Crash logs and stack traces, and error messages the app showed you
- Device model, operating system version, and app version
- Country derived from your IP address (the IP address itself is not stored by us)
- A random installation identifier that is not linked to you or your Google account
- Anonymous events such as "a recording was made", "an effect was applied", "the purchase dialog was shown", or "a recording was shared"
What is never collected: your recordings, text you type, your name, email, contacts, precise location, or advertising identifier.
This data is transmitted encrypted, processed by Google as our service provider, and retained by Google for up to 90 days (crash data) and 14 months (usage statistics). It is not sold and not shared with anyone else. Legal basis: our legitimate interest in keeping the app working and improving it. You can stop all collection by uninstalling the app.
4. How Voice FX Works
Voice FX processes your audio entirely on your device:
- Recording: Audio is captured using your device's microphone and stored locally in your device's cache
- Effects: All voice effects are processed locally using FFmpeg on your device
- Playback: Audio playback happens directly on your device
- Storage: All files are stored in your device's temporary cache and can be deleted at any time
Recording, effects and playback work without an internet connection. A connection is used only to send the crash reports and usage statistics described in section 3, and by Google Play for purchases.
5. Permissions
Voice FX requires the following permissions:
- Microphone: Required to record audio. The app cannot function without this permission.
- Internet access: Used only for crash reports, usage statistics, and Google Play purchases. Your recordings are never uploaded.
We do not request any other permissions.
6. In-App Purchases
Voice FX offers premium effects through a one-time in-app purchase. This purchase is handled entirely by Google Play Billing:
- Payment information is processed by Google, not by us
- We only receive a purchase token from Google to verify your purchase
- No payment information is stored in the app
- Google's privacy policy applies to purchase transactions
7. Third-Party Services
Voice FX uses the following third-party services:
- Google Play Billing: For processing in-app purchases (Google's privacy policy applies)
- Firebase Crashlytics and Google Analytics for Firebase: For the crash reports and usage statistics described in section 3 (Firebase privacy information)
- FFmpeg: Open-source audio processing library that runs entirely on your device
8. Data Storage and Security
All audio recordings and processed files are stored in your device's cache directory:
- Files are stored locally on your device only
- Files are automatically deleted when you delete a recording
- Files may be cleared when you clear the app's cache
- Files are not accessible to other apps (protected by Android's sandbox)
- No cloud storage or backups are created by the app
9. Children's Privacy
Voice FX is not directed to children under 13 and does not knowingly collect personal information from anyone. The crash reports and usage statistics described in section 3 are anonymous and cannot be linked to a person.
10. International Users
Voice FX is available worldwide. Your recordings never leave your device. Crash reports and usage statistics are processed by Google on servers that may be located outside your country, including in the United States, under Google's data-transfer safeguards (such as EU standard contractual clauses).
11. Changes to This Privacy Policy
We may update this Privacy Policy from time to time. Any changes will be posted on this page with an updated "Last Updated" date. Since we don't collect any contact information, we cannot notify you directly of changes.
12. Your Rights
- You have complete control over all recordings on your device and can delete the app and all its data at any time
- Crash reports and usage statistics are anonymous: we cannot identify which records belong to you, so we cannot retrieve or delete them individually. Uninstalling the app stops all further collection
- If you are in the EU/EEA or UK, you also have the right to lodge a complaint with your data protection authority
13. Contact Information
If you have questions about this Privacy Policy or Voice FX, you can contact the developer:
- Email: jaroslav.tomecek@gmail.com
- Website: tomeczech.cz
14. Summary
Voice FX is built with privacy first:
- ✅ Your recordings never leave your device
- ✅ No personal data, no advertising ID
- ✅ No ads, no account
- ✅ 100% local audio processing
- ✅ Only anonymous crash reports and usage statistics
Last updated: September 28, 2026