# AI Reverse Audio vs Engine Sim

The clearest difference is review sentiment: Engine Sim at 86% against AI Reverse Audio's 25%. Engine Sim also leads on rating (4.7 vs 3.3) and update cadence (every 3 days vs every 9 days). AI Reverse Audio's advantage is in-app purchases (none vs 14) and device support (3 vs 1). On price, ratings volume, ads and chart position there is nothing between them.

Both are free to download. Engine Sim sells 14 one-off in-app purchases. AI Reverse Audio asks for nothing beyond the download.

Engine Sim holds the better App Store score, 4.7 against 3.3. Both are backed by a comparable volume of ratings — 30 and 73 respectively. Written reviews point the same way: 25% of AI Reverse Audio's written reviews are positive against 86% of Engine Sim's.

AI Reverse Audio ships an update every 9 days, Engine Sim every 3 days. Both last shipped on October 16, 2026.

## The numbers

| Metric | AI Reverse Audio | Engine Sim |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (30 ratings)](https://appshunter.io/ios/app/ai-reverse-audio/id6755292471/reviews) | **[4.7 (73 ratings)](https://appshunter.io/ios/app/engine-sim-sound-simulator/id6787443044/reviews)** |
| Number of ratings | 30 | **73** |
| Positive reviews | 25.0% of reviews | **85.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 9 days | **Every 3 days** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Best chart rank | #192 | **#170** |
| Size | 165 MB | 43 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Do Huy](https://appshunter.io/developer/1841343010) | [Sena Takasawa](https://appshunter.io/developer/1887478690) |

## What reviewers say

### AI Reverse Audio

[App page](https://appshunter.io/ios/app/ai-reverse-audio/id6755292471)

**Currently charting:** #192 Top Free · Entertainment (US App Store)

Record audio, then play it backward to mimic the reversed sound. Compare your attempts to the original and create unique content for social media or games. Processed locally for privacy.

**Highlights:** One-tap reverse and playback, On-device audio processing, Save and revisit recordings, Simple interface, A/B comparison

**Features:** macOS Compatibility

**In-app purchases:** none


### Engine Sim

[App page](https://appshunter.io/ios/app/engine-sim-sound-simulator/id6787443044)

**Currently charting:** #170 Top Free · Entertainment (US App Store)

Experience realistic engine sounds with interactive controls. Explore a variety of engines, from kei cars to V12s, and feel the vibrations. Practice gear shifting and rev-matching for an immersive automotive simulation.

**Highlights:** 10 realistic engine sounds, Interactive throttle control, Live engine sound generation, Straight-pipe mode, Haptic feedback, H-pattern shifter and paddles, Rev-matching practice

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (14)**

| Purchase | Price | Billing |
| --- | --- | --- |
| V6 Grand Tourer | $1.99 | one-time |
| Starter Pack | $1.99 | one-time |
| Quick Shifter | $1.99 | one-time |
| Big Radiator | $1.99 | one-time |
| Over-Rev Kit | $1.99 | one-time |
| Single 450 Moto | $1.99 | one-time |
| Today's Engine (I6/V8) | $1.99 | one-time |
| Big Bore Kit | $2.99 | one-time |
| Custom Gearbox | $3.99 | one-time |
| Today's Engine (V10/V12) | $4.99 | one-time |
| Straight Pipe | $5.99 | one-time |
| W16 Hypercar | $9.99 | one-time |
| Pro Parts Pack | $9.99 | one-time |
| Unlock Everything | $49.99 | one-time |


## Frequently asked questions

### Is AI Reverse Audio free?

AI Reverse Audio is free to download, with no in-app purchases.

### Is Engine Sim free?

Engine Sim is free to download, with in-app purchases available.

### Which has better reviews, AI Reverse Audio or Engine Sim?

Engine Sim is rated higher. AI Reverse Audio averages 3.3 out of 5 from 30 ratings, while Engine Sim averages 4.7 from 73 ratings.

### Do AI Reverse Audio or Engine Sim have ads?

Both AI Reverse Audio and Engine Sim show ads.

### Which is updated more often, AI Reverse Audio or Engine Sim?

AI Reverse Audio ships an update every 9 days, and Engine Sim every 3 days. Most recently, AI Reverse Audio was updated on October 16, 2026 and Engine Sim on October 16, 2026.

### Which is more popular, AI Reverse Audio or Engine Sim?

AI Reverse Audio currently peaks at #192 in the App Store charts, and Engine Sim at #170. Chart position reflects recent download velocity rather than total install base.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*