# Sonus - Vroom — Your acceleration, amplified

> Dynamic engine sound simulator using phone accelerometer data. (iPhone/iPad app by 鹏飞 王.)

- Source: https://appshunter.io/ios/app/sonus-vroom/id6811902387 (this page in markdown: same URL + `.md`)
- Developer: [鹏飞 王](https://appshunter.io/developer/6811728228)
- Category: Entertainment, Travel
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 16.0 · 30 MB
- Languages: American English, Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2026-10-12
- Data updated: 2026-10-26
- Monetization: free with in-app purchases

## What is Sonus?

Sonus turns the push you feel into the engine you wish you had.

The phone's accelerometer samples acceleration 100 times a second. Sonus turns that into virtual revs, gears and load, then builds the sound from eight looping layers per engine — crossfaded and varispeed-shifted so the pitch tracks the revs the way a real engine does. Nothing is pre-rendered, so no two drives sound the same.

WHAT YOU GET

• Seven engines — V8, V12, turbocharged inline-six, four-cylinder, flat-six, electric motor and a V-twin. Each with its own idle, redline and gearbox.
• Lift-off backfire and upshift thud on the engines that have them.
• A trip log: peak G, top speed and 0–100 for every drive.
• Dynamic Island and Lock Screen: revs, gear and G while you drive.
• An Apple Watch companion — start and stop from your wrist, with a rev ring.
• A manual mode that drives the whole chain with four buttons, no car needed.

HOW IT SOUNDS RIGHT

• GPS corrects the speed estimate, because an accelerometer cannot see a steady cruise. Lose the fix in a tunnel and the estimate holds instead of dropping to idle.
• A calibration pull teaches Sonus where the car's nose is, so a phone mounted sideways or at an angle still reads acceleration correctly.
• Latency compensation runs the engine slightly early, so a Bluetooth speaker lands the sound with the push instead of after it.
• The mix runs through a limiter, so it is loud without clipping, and it shares the stereo with music and navigation.

SAFETY AND PRIVACY

Sonus only makes sound. It never connects to the car and changes nothing about how the car behaves. Hold IGNITION for half a second to start, so a brushed phone does not start it for you.

Everything runs on the device. No account, no analytics, no data leaves the phone. Location is used only while the sound is running.

ONE PURCHASE

Sonus is free with one engine. A single in-app purchase unlocks all seven, for good — no subscription, no ads, no consumables.

Every engine sound is synthesised, not a recording of a real car; the names are original and represent no real vehicle.

## Key features

- Dynamic engine sound synthesis
- Accelerometer-based acceleration tracking
- Multiple engine types (V8, V12, electric, etc.)
- Trip log with G-force and speed data
- Apple Watch companion app
- Dynamic Island and Lock Screen integration
- Manual sound control mode

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Full Unlock | $4.99 | one-time |


## Is Sonus safe?

Not enough ratings yet to assess Sonus.

## Is Sonus legit?

Sonus - Vroom has limited verification signals. The AppsHunter Legitimacy Score for Sonus is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Frequently asked questions about Sonus

### What is Sonus - Vroom?

Sonus - Vroom is an entertainment app that uses your phone's accelerometer to generate realistic engine sounds based on your acceleration. It offers various engine types and features like a trip log and Apple Watch integration.

### Does Sonus - Vroom have ads?

No, Sonus - Vroom is ad-free. The app is free to download with one engine, and all seven engines can be unlocked with a single in-app purchase, with no subscriptions or advertisements.

### How does Sonus - Vroom work?

The app's accelerometer samples acceleration 100 times per second, which Sonus uses to create virtual revs, gears, and engine load. It then builds sound from eight looping layers per engine, crossfaded and varispeed-shifted for realistic pitch tracking.

### What engines are available in Sonus - Vroom?

Sonus - Vroom includes seven engine types: V8, V12, turbocharged inline-six, four-cylinder, flat-six, electric motor, and a V-twin. Each engine has its own unique idle, redline, and gearbox characteristics.

### Can I use Sonus - Vroom offline?

The app's core sound generation runs on the device, meaning it does not require an internet connection for basic functionality. GPS is used to correct speed estimates, but the sound generation itself is offline-capable.

### What devices does Sonus - Vroom support?

Sonus - Vroom is available for iPhone and Apple Watch. The Apple Watch companion app allows you to start and stop the sound from your wrist, featuring a rev ring.

### How is the sound quality in Sonus - Vroom?

The sound is synthesized in real-time and is not pre-rendered, ensuring no two drives sound exactly the same. Features like GPS correction, calibration pulls, and latency compensation are used to ensure accurate and well-timed sound output, even with Bluetooth speakers.

### What is the age rating for Sonus - Vroom?

Sonus - Vroom has an age rating of 4+. The app focuses on sound simulation and does not contain any inappropriate content for younger users.

## Version history (last 2 releases)

### 1.1 — 2026-10-25

• Speed reads in mph, with a 0–60 timer, where roads are signed in miles — the US, the UK and a few others.
• Traditional Chinese.
• The privacy policy is now in Settings, and a short privacy notice appears on first launch.
• Restore purchase is more reliable.

### 1.0 — 2026-10-13

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-26.*