Slowed + Reverb & 8D Audio for Android
Pick a song on your phone, choose an effect, listen, then save the song or a short video. The app works offline and keeps your files on your phone.
Slowed + Reverb, Sped Up, Nightcore
One tap for each style, or set the speed, reverb and room size yourself. Hear it right away.
8D audio
The song circles around your head. Pick how fast it turns. Best with headphones.
Video for Reels, Shorts and TikTok
A spinning record with your song title and a live sound bar, ready to post.
Offline and private
Songs are processed on your phone. Nothing is uploaded and you need no account.
Free and Pro
- Free: every effect, 1 free save to try it, videos up to 30 seconds with a small "Made with" line.
- Pro (one payment, no subscription): unlimited saves, no "Made with" line, videos up to 3 minutes, WAV export and 256 kbps M4A.
Use songs you own or have the right to use. The app has no music catalogue and does not download songs. On a computer? The same effects work in your browser: 8D audio, speed changer and pitch changer.
App privacy policy
For the Android app "Slowed + Reverb & 8D Audio" (com.audioutils.slowedreverb). Last updated: October 25, 2026.
Your songs stay on your phone
The app reads the song you pick and applies the effect on your phone. Songs, videos and effect settings are never uploaded to us or anyone else. Files you save go to your phone's Music or Movies folder. Temporary files stay in the app's private cache and are removed when you uninstall the app.
No account, no ads, no tracking
The app has no sign-in, shows no ads, and has no analytics or advertising ID. The number of free saves you used today is stored only on your phone.
Purchases
Pro is bought through Google Play. Google handles the payment; we never see your card. We use RevenueCat to check whether Pro is active. RevenueCat receives a random app user ID and your purchase history for this app (product, date, price, store order ID). It does not receive your songs. See the RevenueCat privacy policy and the Google privacy policy.
Permissions
Internet is used only to check purchases. The app opens songs through Android's file picker, so it does not need access to all your files.
Children
The app is not directed at children under 13 and collects no personal data from them.
Deleting your data
Uninstall the app to remove everything it stored on your phone. To ask about purchase records, email support@audioutils.com.
Contact
Questions or help: support@audioutils.com. Website privacy policy: audioutils.com/privacy.