# Keep On Line vs MX Engines

The clearest difference is update cadence: Keep On Line at every 3 weeks against MX Engines's every 16 months. MX Engines's advantage is ratings volume (360 vs 55) and iOS requirement (13.0 vs 15.0). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. Keep On Line sells 9 one-off in-app purchases and MX Engines sells 13 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 3.9 for Keep On Line against 3.8 for MX Engines. That said, the two scores are not equally well evidenced: MX Engines has 360 ratings behind it against 55, so its average is the more settled of the two. Written reviews are what separate them: 80% of Keep On Line's written reviews are positive against 74% of MX Engines's.

Keep On Line ships an update every 3 weeks, MX Engines every 16 months. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Keep On Line | MX Engines |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (55 ratings)](https://appshunter.io/ios/app/keep-on-line/id882255727/reviews)** | [3.8 (360 ratings)](https://appshunter.io/ios/app/mx-engines/id6450510510/reviews) |
| Number of ratings | 55 | **360** |
| Positive reviews | **80.0% of reviews** | 73.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 3 weeks** | Every 16 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 29 MB | 194 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NextGen Software Limited Liability Company](https://appshunter.io/developer/839833996) | [Marcos Elena](https://appshunter.io/developer/1645348996) |

## What reviewers say

### Keep On Line

[App page](https://appshunter.io/ios/app/keep-on-line/id882255727)

A simple yet challenging game where players must guide a ball along a tricky line. Master the controls to stay on the path for as long as possible. Unlock customization options and use credits to continue your game.

**Highlights:** Keep ball on the line gameplay, Challenging and tricky lines, Touch and drag controls, Unlockable ball and theme colors, Live credits for continues, Mix and match color customization

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads forever | $0.99 | one-time |
| 3 Live Credits | $0.99 | one-time |
| 5 Live Credits | $1.49 | one-time |
| Neon Pack | $1.99 | one-time |
| 10 Live Credits | $2.49 | one-time |
| Aurora Pack | $2.99 | one-time |
| Ember Pack | $2.99 | one-time |
| Celestial Pack | $2.99 | one-time |
| Golden Hour Pack | $4.99 | one-time |


### MX Engines

[App page](https://appshunter.io/ios/app/mx-engines/id6450510510)

Experience the thrill of online motocross with this game. Compete with friends and players worldwide in multiplayer rooms, perform impressive tricks, and customize your bikes and pilot with a variety of options. Enjoy realistic physics and diverse maps for an engaging racing experience.

**Highlights:** Online multiplayer mode, Realistic physics engine, Variety of bikes and maps, Bike customization with upgrades and skins, Pilot customization, Perform tricks and stunts

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

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads | $2.99 | one-time |
| Map 5 | $2.99 | one-time |
| Map 6 | $2.99 | one-time |
| Map 7 | $2.99 | one-time |
| Coins 2 | $2.99 | one-time |
| Diamonds 1 | $2.99 | one-time |
| Map 8 | $2.99 | one-time |
| Coins 3 | $4.99 | one-time |
| Diamonds 2 | $4.99 | one-time |
| Coins 4 | $9.99 | one-time |
| Diamonds 3 | $9.99 | one-time |
| Coins 5 | $14.99 | one-time |
| Diamonds 5 | $19.99 | one-time |

**What reviewers like**

- 👍 Fun and engaging gameplay
- 🚀 Smooth and responsive controls
- 💡 Potential for great mobile MX game

**What reviewers complain about**

- 🐛 Frequent crashes and bugs
- 🔋 Slow bike speeds and lack of power
- 🤔 Expensive upgrades and in-app purchases

**Reported bugs**

- Inconsistent and unreliable physics
- Crashing issues when landing jumps
- Unresponsive or buggy controls
- Lucky wheel feature not working as intended

**Requested features**

- Add wheelie and trick functionality
- Improve in-air control and physics
- Introduce more free tracks and maps
- Implement better leaning and turning mechanics
- Add ruts and terrain deformation


## Frequently asked questions

### Is Keep On Line free?

Keep On Line is free to download, with in-app purchases available.

### Is MX Engines free?

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

### Which has better reviews, Keep On Line or MX Engines?

Keep On Line is rated higher. Keep On Line averages 3.9 out of 5 from 55 ratings, while MX Engines averages 3.8 from 360 ratings.

### Do Keep On Line or MX Engines have ads?

Both Keep On Line and MX Engines show ads.

### Which is updated more often, Keep On Line or MX Engines?

Keep On Line ships an update every 3 weeks, and MX Engines every 16 months. Most recently, Keep On Line was updated on October 29, 2026 and MX Engines on October 30, 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.*