# FlexicX vs Engine Sim

The clearest difference is rating: FlexicX at 4.8 against Engine Sim's 4.6. FlexicX also leads on ratings volume (12K vs 1.1K) and device support (3 vs 1). Engine Sim's advantage is update cadence (every 3 days vs every 8 days). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. FlexicX sells 7 in-app purchases, starting at $2.99 per month and Engine Sim sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

FlexicX holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: FlexicX has 12K ratings behind it against 1.1K, so its average is the more settled of the two. Written reviews point the same way: 88% of FlexicX's written reviews are positive against 86% of Engine Sim's.

FlexicX ships an update every 8 days, Engine Sim every 3 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | FlexicX | Engine Sim |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (12K ratings)](https://appshunter.io/ios/app/flexicx/id6630386616/reviews)** | [4.6 (1.1K ratings)](https://appshunter.io/ios/app/engine-sim-sound-simulator/id6787443044/reviews) |
| Number of ratings | **12K** | 1.1K |
| Positive reviews | **88.1% of reviews** | 85.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 8 days | **Every 3 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | #135 | **#85** |
| Size | 1.2 GB | 44 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SIDGIN LLC](https://appshunter.io/developer/1762446045) | [Sena Takasawa](https://appshunter.io/developer/1887478690) |

## What reviewers say

### FlexicX

[App page](https://appshunter.io/ios/app/flexicx/id6630386616)

**Currently charting:** #135 Top Grossing · Racing, #146 Top Free · Racing (US App Store)

Experience unparalleled softbody destruction with a cutting-edge physics engine. Engage in interactive crash tests with lifelike car models that crumple, bend, and break in real-time. Optimized for mobile, this game offers a dynamic and immersive destruction simulation.

**Highlights:** Realistic softbody physics, Dynamic car deformations, Interactive crash tests, Lifelike car models, Optimized mobile performance, Unique crash scenarios

**Features:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Silver | $2.99 | per month |
| Gold 100 | $1.99 | one-time |
| Gold 300 | $3.99 | one-time |
| Gold 700 | $6.99 | one-time |
| Gold 1000 | $9.99 | one-time |
| Gold 5000 | $39.99 | one-time |
| Gold 15000 | $99.99 | one-time |

**What reviewers like**

- 🚀 Realistic crash physics
- 👍 Smooth gameplay
- 🚀 Impressive car models
- 👍 Enjoyable car crash experience
- 👍 Worth the long wait

**What reviewers complain about**

- 🐛 Mustang engine model issues
- 🐛 Machforce GT button bug
- 🐛 Inability to link Game Center account
- 🐛 Garage texture loading issues
- 🐛 Limited maps and terrain options

**Reported bugs**

- Mustang engine model issues
- Machforce GT button bug
- Inability to link Game Center account
- Garage texture loading issues
- Limited maps and terrain options

**Requested features**

- Add more maps and terrain options
- Improve ways to earn in-game currency
- Fix bugs with unlocking certain cars
- Optimize performance and stability


### Engine Sim

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

**Currently charting:** #85 Top Free · Racing, #106 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 FlexicX free?

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

### Is Engine Sim free?

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

### Which has better reviews, FlexicX or Engine Sim?

FlexicX is rated higher. FlexicX averages 4.8 out of 5 from 12K ratings, while Engine Sim averages 4.6 from 1.1K ratings.

### Do FlexicX or Engine Sim have ads?

Both FlexicX and Engine Sim show ads.

### Which is updated more often, FlexicX or Engine Sim?

FlexicX ships an update every 8 days, and Engine Sim every 3 days. Most recently, FlexicX was updated on November 3, 2026 and Engine Sim on October 31, 2026.

### Which is more popular, FlexicX or Engine Sim?

FlexicX currently peaks at #135 in the App Store charts, and Engine Sim at #85. 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.*