# Traffic SM++ vs Engine Sim

The clearest difference is rating: Engine Sim at 4.6 against Traffic SM++'s 3.0. Engine Sim also leads on ratings volume (1.2K vs 2). Traffic SM++'s advantage is in-app purchases (none vs 10) and update cadence (daily vs every 3 days). On price, ads, chart position and device support there is nothing between them.

Both are free to download. Engine Sim sells 10 one-off in-app purchases. Traffic SM++ asks for nothing beyond the download.

Engine Sim holds the better App Store score, 4.6 against 3.0. That said, the two scores are not equally well evidenced: Engine Sim has 1.2K ratings behind it against 2, so its average is the more settled of the two.

Traffic SM++ ships an update daily, Engine Sim every 3 days. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Traffic SM++ | Engine Sim |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/traffic-sm-plus-plus/id6766185084/reviews) | **[4.6 (1.2K ratings)](https://appshunter.io/ios/app/engine-sim-sound-simulator/id6787443044/reviews)** |
| Number of ratings | 2 | **1.2K** |
| Positive reviews | — | 82.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Daily** | Every 3 days |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Best chart rank | #133 | **#99** |
| Size | 84 MB | 44 MB |
| Requires iOS | **14.0** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Dipbhai Sanjaybhai Rai](https://appshunter.io/developer/1812386989) | [Sena Takasawa](https://appshunter.io/developer/1887478690) |

## What reviewers say

### Traffic SM++

[App page](https://appshunter.io/ios/app/traffic-sm-plus-plus/id6766185084)

**Currently charting:** #133 Top Free · Racing (US App Store)

This app analyzes vehicle dynamics including speed, cornering, braking, and pit strategy. Input your car's specifications and road conditions to receive instant, data-driven results within a stylish interface designed for automotive enthusiasts.

**Highlights:** Vehicle dynamics analysis, Speed, cornering, braking calculations, Drift and pit strategy modules, Customizable car specs, Road condition input, Neon-powered interface

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

**In-app purchases:** none


### Engine Sim

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

**Currently charting:** #99 Top Free · Racing, #146 Top Grossing · Racing (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, iPhone Duo support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter Pack | $1.99 | one-time |
| Big Radiator | $1.99 | one-time |
| Over-Rev Kit | $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 |
| W16 Hypercar | $9.99 | one-time |
| Pro Parts Pack | $9.99 | one-time |
| Unlock Everything | $49.99 | one-time |


## Frequently asked questions

### Is Traffic SM++ free?

Traffic SM++ 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, Traffic SM++ or Engine Sim?

Engine Sim is rated higher. Traffic SM++ averages 3.0 out of 5 from 2 ratings, while Engine Sim averages 4.6 from 1.2K ratings.

### Do Traffic SM++ or Engine Sim have ads?

Both Traffic SM++ and Engine Sim show ads.

### Which is updated more often, Traffic SM++ or Engine Sim?

Traffic SM++ ships an update daily, and Engine Sim every 3 days. Most recently, Traffic SM++ was updated on November 6, 2026 and Engine Sim on November 5, 2026.

### Which is more popular, Traffic SM++ or Engine Sim?

Traffic SM++ currently peaks at #133 in the App Store charts, and Engine Sim at #99. 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.*