Terms of Use

These Terms of Use ("Terms") govern your use of Backtalk: Voice Reverser ("the app"), provided by Sensi Tech ("we", "us"). By installing or using the app you agree to these Terms. If you do not agree, please do not use the app. Our Privacy Policy explains how data is handled.

1. What the app does

The app records your voice with the microphone and plays it backward. You can change speed and pitch, try voice effects, save or share a take, and play the Reverse Challenge: record a phrase, listen to it reversed, record yourself imitating the reversed sound, and get a score out of 100. It also includes a phrase bank, backward puzzles, party mode, original character voices made with your phone's text-to-speech engine, backwards clips, reversing audio files and videos you choose, and reversing text you type.

All audio processing and scoring happen on your phone. The app does not modify your device, other apps, or anything outside its own storage and the files you choose to save.

2. Scores and results

The mimic score is calculated on your phone by comparing the sound of your recording with the reversed original. It is a game score for fun, not a measurement of speech, hearing or language ability, and it can differ between phones, microphones and noise levels. Character voices are made up and are produced by your phone's text-to-speech engine, so how they sound depends on the engine and voices installed on your device. We do not promise any particular score or sound.

3. Your content and other people's voices

Your recordings remain yours and stay on your device unless you save or share them. Only record people who agree to be recorded, and only reverse, save or share audio, video or text you have the right to use. Do not use the app to impersonate real people or to mislead others. The phrases, puzzles, clips and characters included in the app may be used for personal fun; all characters are fictional.

4. Licence

We grant you a personal, non-exclusive, non-transferable, revocable licence to use the app on devices you own or control, for personal, non-commercial purposes. You may not copy, resell, rent or redistribute the app or its built-in content as a collection, reverse engineer or decompile the app except where the law allows it, remove notices, or bypass its advertising or purchase system.

5. Advertising

The app is free and shows ads from Google AdMob and AppLovin. Ads are limited in frequency and are never shown to VIP subscribers. Rewarded ads are always optional: an ad plays only after you tap a button that says so yourself. Watching "Remove ads for 2 hours" to the end turns off ads for 2 hours, and the streak button keeps your day streak after you missed one day; neither unlocks any feature. Ads are provided by third parties and we are not responsible for the products or services they promote.

6. VIP subscription

VIP is optional and only removes ads. Every feature and all content in the app are free for everyone, with or without VIP.

• VIP is sold and billed by Google Play, for the plan periods shown on the VIP screen (weekly, monthly or yearly), at the price shown on the VIP screen and in Google Play before you confirm.
• Where a free trial is offered, its length and the date you will first be charged are shown before you confirm. If you do not cancel before the trial ends, the subscription starts and is charged automatically.
• The subscription renews automatically at the end of each period until you cancel it.
• You can cancel at any time in Google Play → Profile → Payments and subscriptions → Subscriptions, or from the app (Manage subscription on the VIP screen). Cancelling stops future renewals; VIP stays active until the end of the period you already paid for. Uninstalling the app does not cancel the subscription.
• Refunds are handled by Google under the Google Play refund policy. We cannot issue refunds directly because we never receive your payment details.
• If the price changes, Google Play notifies you in advance and you can decline the new price by cancelling.

7. Third-party services

Some features rely on services we do not control: Google Play (purchases), Google AdMob and AppLovin (ads), Google Firebase (analytics and crash reports), your phone's text-to-speech engine (character voices and typed text), and your phone's camera, file and photo picker apps (Reverse Video and audio files). Your use of them is also subject to their own terms and policies, and we are not responsible for their availability or content.

8. Acceptable use

Do not use the app to break the law, to record people without their consent, to infringe intellectual-property or privacy rights, to create or spread harmful content, or to interfere with the app or its ads (for example by generating fake ad clicks). Keep the volume at a comfortable level, especially with headphones.

9. No warranty

The app is provided "as is" and "as available", without warranties of any kind, express or implied, including fitness for a particular purpose and uninterrupted or error-free operation, to the extent permitted by law. Some features depend on your phone's microphone, text-to-speech engine and media support and may not work the same on every device.

10. Limitation of liability

To the maximum extent permitted by law, Sensi Tech is not liable for indirect, incidental, special or consequential damages, or for loss of data, recordings or profits, arising from your use of or inability to use the app. Our total liability for any claim is limited to the amount you paid for the app in the twelve months before the claim. Nothing in these Terms limits liability that cannot be limited by law.

11. Termination

You can stop using the app at any time by uninstalling it (and cancelling any subscription in Google Play). We may suspend or end your licence if you seriously breach these Terms. Sections 3, 9, 10 and 13 survive termination.

12. Changes

We may update these Terms when the app changes. The updated version will be posted on this page with a new effective date. Continuing to use the app after an update means you accept the new Terms.

13. Governing law

These Terms are governed by the laws of Vietnam, where Sensi Tech is established. This does not take away any mandatory consumer protection rights you have under the laws of the country where you live.

14. Contact

Questions about these Terms: Sensi Tech, CC Đồng Phát, Hà Nội 11700, Vietnam. Email: hanhnt3009.ffh4x.publish@gmail.com