# Open Challenge Car Driving 3D vs Traffic SM++

The clearest difference is in-app purchases: Traffic SM++ at none against Open Challenge Car Driving 3D's 4. Traffic SM++ also leads on update cadence (daily vs every 3 weeks) and chart position (#73 vs unranked). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Open Challenge Car Driving 3D sells 4 one-off in-app purchases. Traffic SM++ asks for nothing beyond the download.

Open Challenge Car Driving 3D ships an update every 3 weeks, Traffic SM++ daily. The most recent releases landed on November 5, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Open Challenge Car Driving 3D | Traffic SM++ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/traffic-sm-plus-plus/id6766185084/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 3 weeks | **Daily** |
| Monetization | — | Ad-supported |
| Best chart rank | — | **#73** |
| Size | 618 MB | 84 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Knights IOS Inc](https://appshunter.io/developer/1474799614) | [Dipbhai Sanjaybhai Rai](https://appshunter.io/developer/1812386989) |

## What reviewers say

### Open Challenge Car Driving 3D

[App page](https://appshunter.io/ios/app/open-challenge-car-driving-3d/id6760104796)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads | $5.99 | one-time |
| Ad-Free + Bonus Currency | $5.99 | one-time |
| All Cars Unlocked | $9.99 | one-time |
| Ultimate Special Offer | $12.99 | one-time |


### Traffic SM++

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

**Currently charting:** #73 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


## Frequently asked questions

### Is Open Challenge Car Driving 3D free?

Open Challenge Car Driving 3D is free to download, with in-app purchases available.

### Is Traffic SM++ free?

Traffic SM++ is free to download, with no in-app purchases.

### Do Open Challenge Car Driving 3D or Traffic SM++ have ads?

Both Open Challenge Car Driving 3D and Traffic SM++ show ads.

### Which is updated more often, Open Challenge Car Driving 3D or Traffic SM++?

Open Challenge Car Driving 3D ships an update every 3 weeks, and Traffic SM++ daily. Most recently, Open Challenge Car Driving 3D was updated on November 5, 2026 and Traffic SM++ on November 6, 2026.

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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.*