Comparison

Otto vs BackPlay

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Otto

Easily record and reverse any sound, from your voice to music. Participate in viral challenges, create funny backward speech, or experiment with unique audio effects. Save and share your creations instantly.

Highlights
  • Instant reverse playback
  • Backwards voice recording
  • Save and share reversed audio
  • High-quality sound processing
  • Simple and intuitive interface
Read full description

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: ugur@synappsai.com Terms: https://www.synappsai.com/terms-of-use Privacy: https://www.synappsai.com/privacy-policy

About

BackPlay

Record any sound, then instantly reverse it to hear how it sounds backward. Easily share your creations with friends or on social media. Experience audio in a fun, new way with a simple interface.

Highlights
  • Record audio
  • Reverse sound instantly
  • Live waveform display
  • Export original or reversed audio
  • Share creations
  • Simple and easy to use
Features
Read full description

Record & Flip in seconds. Curious how your voice sounds backward? BackPlay lets you grab any sound, reverse it, and share the fun. How it works: - Record sound using your phone’s mic—chat, sing. - Listen in original or reversed mode while the live waveform dances. Highlights: - Crisp, high-quality audio recording. - Instantly reverse your voice or any sounds. - Export whichever version you like and share it with anyone or on social platforms. - Simple design and easy to use, start anytime. Tap record, flip your sound, and hear the world inside out. Privacy Policy: https://www.freeprivacypolicy.com/live/50327b77-61eb-49c7-a16f-0d1d2a302286 Terms of Use: https://www.freeprivacypolicy.com/live/43f777a1-827e-432f-8c7c-10316e41963c

Screenshots

Otto4 screens
BackPlay3 screens

Verdict

The call

The clearest difference is rating: Otto at 5.0 against BackPlay's 4.4. BackPlay's advantage is ratings volume (16 vs 2). On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Otto sells 3 in-app purchases, starting at $3.99 per 7 days and BackPlay sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Otto holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: BackPlay has 16 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Otto ships an update every 3 weeks, BackPlay every 2 weeks. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.

Scorecard2 real differences · 7 level
Otto versus BackPlay: the parameters behind the verdict, then further details
ParameterOttoBackPlay
PriceFreeFree
Rating5.0 (2 ratings) — better4.4 (16 ratings)
Number of ratings216 — better
Update frequencyEvery 3 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhoneiPhone
Requires iOS17.016.0 — better
Further details — not scored
Size12 MB14 MB
Age rating4+4+
DeveloperSYNAPPS AI LTD琳 陆

Customer experience

Otto

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

BackPlay

All ratings16 ratings
Positive87.5%
Neutral6.3%
Negative6.3%

In-app purchases

3 purchases

Otto

Subscriptions3
  • Reverse Singing Pro$3.997 Days
  • Reverse Singing Pro$9.991 Month
  • Reverse Singing Pro$39.991 Year
1 purchases

BackPlay

One-time1
  • BackPlay Lifetime PRO$3.99

Questions

Is Otto free?
Otto is free to download, with in-app purchases available.
Is BackPlay free?
BackPlay is free to download, with in-app purchases available.
Which has better reviews, Otto or BackPlay?
Otto is rated higher. Otto averages 5.0 out of 5 from 2 ratings, while BackPlay averages 4.4 from 16 ratings.
Do Otto or BackPlay have ads?
Neither Otto nor BackPlay shows ads.
Which is updated more often, Otto or BackPlay?
Otto ships an update every 3 weeks, and BackPlay every 2 weeks. Most recently, Otto was updated on October 27, 2026 and BackPlay on October 30, 2026.

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