Otto: Reverse Audio & ASMR
Not in any tracked top chart right now.
Updated 21 Oct 2026 · rankings refresh through the day
DeveloperSYNAPPS AI LTD
CategoryMusic
PriceFree
Released
Rating★ 5.0 (2)
Version2.1
Age rating4+
First seen by us
20 Oct 2026
20 Oct 2026Rating
5.0 ★
2 ratings
Measured
Otto: Reverse Audio & ASMR on the App Store
App details
App ID
6752802267
Publisher
SYNAPPS AI LTD
On the store since
Sep 2025
1 year on the store
Minimum OS
iOS 17.0+
iPhone XS and later
Devices
iPhone · iPad
Content rating
4+
Languages
1
EN
Size
12 MB
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Not charting right now. | ||
Ratings
App Store, worldwide.
Rating
5.0 ★
2 ratings
Measured
Ratings
2
Measured
About Otto: Reverse Audio & ASMR
Otto turns your voice into something worth sharing. Record, flip it backwards, drop an effect on it, then send it out as a video. The name reads the same backwards, and so does everything you make here.
SHARE IT AS A VIDEO
Audio files go nowhere on social apps. Otto renders your recording as a vertical video with an animated waveform and your own caption, sized for TikTok, Reels and Shorts. Save it to Photos or share it straight from the app.
ELEVEN VOICE EFFECTS
Reverse is where it started. Now you also get Slowed for that late night sound, Chipmunk, Demon, Whisper, Robot, Phone, Megaphone, Underwater, Glitch and Cave. Record once and try every one of them on the same take.
ASMR BACKGROUNDS
Layer a soft sound under your voice: rain, white noise, keyboard clicks, tapping, brushing, paper crinkle, fireplace, wind or a slow heartbeat. Set how much of it you want with one slider. Pair it with Whisper and you have an ASMR clip in seconds.
THE BACKWARDS CHALLENGE
Read a phrase out loud. Otto plays it backwards. Now try to copy that sound. Otto reverses your attempt and puts it next to the original, then scores how close you got. Bring a friend, it gets worse for both of you.
WHAT IT IS GOOD FOR
Reverse singing and say it backwards clips
Funny voice messages your friends will replay
ASMR and whisper content with a background you choose
Sound effects for videos and music
Finding out what a laugh or a sneeze sounds like in reverse
FREE AND PRO
Free gives you recording, four effects, three ASMR backgrounds, full length playback with nothing cut short, the challenge, and video export with a small watermark.
Pro removes the watermark and unlocks the remaining effects and ASMR backgrounds. That is the whole difference.
Everything runs on your device. No account, no sign up, and it works with no connection.
Contact: [email protected]
Terms: https://www.synappsai.com/terms-of-use
Privacy: https://www.synappsai.com/privacy-policy
SHARE IT AS A VIDEO
Audio files go nowhere on social apps. Otto renders your recording as a vertical video with an animated waveform and your own caption, sized for TikTok, Reels and Shorts. Save it to Photos or share it straight from the app.
ELEVEN VOICE EFFECTS
Reverse is where it started. Now you also get Slowed for that late night sound, Chipmunk, Demon, Whisper, Robot, Phone, Megaphone, Underwater, Glitch and Cave. Record once and try every one of them on the same take.
ASMR BACKGROUNDS
Layer a soft sound under your voice: rain, white noise, keyboard clicks, tapping, brushing, paper crinkle, fireplace, wind or a slow heartbeat. Set how much of it you want with one slider. Pair it with Whisper and you have an ASMR clip in seconds.
THE BACKWARDS CHALLENGE
Read a phrase out loud. Otto plays it backwards. Now try to copy that sound. Otto reverses your attempt and puts it next to the original, then scores how close you got. Bring a friend, it gets worse for both of you.
WHAT IT IS GOOD FOR
Reverse singing and say it backwards clips
Funny voice messages your friends will replay
ASMR and whisper content with a background you choose
Sound effects for videos and music
Finding out what a laugh or a sneeze sounds like in reverse
FREE AND PRO
Free gives you recording, four effects, three ASMR backgrounds, full length playback with nothing cut short, the challenge, and video export with a small watermark.
Pro removes the watermark and unlocks the remaining effects and ASMR backgrounds. That is the whole difference.
Everything runs on your device. No account, no sign up, and it works with no connection.
Contact: [email protected]
Terms: https://www.synappsai.com/terms-of-use
Privacy: https://www.synappsai.com/privacy-policy
Latest updates
2.1
The app is now called Otto, and it does a lot more than reverse.
YOUR RECORDING CAN LEAVE AS A VIDEO
Render any recording as a vertical video with an animated waveform and your own caption, then save it to Photos or share it. Audio files were never accepted by social apps, so this was the missing piece.
TEN NEW VOICE EFFECTS
Slowed, Chipmunk, Demon, Whisper, Robot, Phone, Megaphone, Underwater, Glitch and Cave now sit next to Reverse. Record once and try them all on the same take.
ASMR BACKGROUNDS
Put a soft sound under your voice and set the level yourself. Rain, white noise, keyboard, tapping, brushing, paper crinkle, fireplace, wind and heartbeat.
THE BACKWARDS CHALLENGE
Read a phrase, hear it backwards, then try to say the backwards version. Otto reverses your attempt and scores how close you got.
FREE PLAYBACK IS NO LONGER CUT SHORT
You can hear and share your full recording without paying. Pro now covers the watermark and the extra effects and backgrounds.
