Keep On Line vs MX Engines
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Keep On Line
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.
- 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
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A little marble. A winding path. Just one more roll. Keep On Line returns with nine little worlds and a simple challenge: stay on the line. Drag to steer through floating gardens, neon nights, coral reefs and quiet observatories. Find your rhythm as the path gets faster and the turns get tighter. Choose your route at branching paths, collect gems and chase a new personal best. • Endless: a fresh course each run, with one optional continue. • Daily line: the same course for everyone that day, with no continues. • Fifteen challenges to clear and bonus gems to earn. • Nine worlds to discover through play. • Collect marble colors and trails, including optional paid exclusives. • Switch between an angled 3D view and a classic overhead view. • Music, sound effects and optional haptic feedback. Free to play with ads and optional in-app purchases. Golden Hour includes its exclusive marble, all nine worlds and removal of automatic ads. Other cosmetic packs include only the marble and trail shown. Worlds can also be unlocked through play. Extra lives are single-use continues for Endless only. Your progress is stored on your device. Purchases and ads require an internet connection. Available in English, Spanish, Turkish, Brazilian Portuguese, French, German, Japanese, Korean, Italian, Arabic and Traditional Chinese.
MX Engines
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.
- Online multiplayer mode
- Realistic physics engine
- Variety of bikes and maps
- Bike customization with upgrades and skins
- Pilot customization
- Perform tricks and stunts
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Welcome to MX Engines, the best online motocross game yet. Enjoy the online mode, where you can create or join rooms to play with your friends and more players. Enjoy a wide variety of maps and bikes, do amazing tricks and stunts to impress your friends! We have a wide variety of bikes and upgrades to customize it. You can also customize your pilot. Game Features: - Online mode. - Real physics. - Different bikes. - Customize your bikes with different skins and upgrades. - Customize your pilot. - Make amazing jumps.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Keep On Line | MX Engines |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (55 ratings) — better | 3.8 (360 ratings) |
| Positive reviews | 80.0% of reviews — better | 73.7% of reviews |
| Number of ratings | 55 | 360 — better |
| Update frequency | Every 3 weeks — better | Every 16 months |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 29 MB | 194 MB |
| Age rating | 4+ | 4+ |
| Developer | NextGen Software Limited Liability Company | Marcos Elena |
Customer experience
Keep On Line
MX Engines
Bugs and requests
Keep On Line
Not enough reviews yet to summarise bugs or requests.
MX Engines
Reported bugs
4 issues- Inconsistent and unreliable physics
- Crashing issues when landing jumps
- Unresponsive or buggy controls
- Lucky wheel feature not working as intended
Requested features
6 requests- 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
Show 1 moreShow fewer
- Improve bike customization options
In-app purchases
Keep On Line
- Remove ads forever$0.99
- 3 Live Credits$0.99
- 5 Live Credits$1.49
Show 6 moreShow fewer
- Neon Pack$1.99
- 10 Live Credits$2.49
- Aurora Pack$2.99
- Ember Pack$2.99
- Celestial Pack$2.99
- Golden Hour Pack$4.99
MX Engines
- No Ads$2.99
- Map 5$2.99
- Map 6$2.99
Show 10 moreShow fewer
- Map 7$2.99
- Coins 2$2.99
- Diamonds 1$2.99
- Map 8$2.99
- Coins 3$4.99
- Diamonds 2$4.99
- Coins 4$9.99
- Diamonds 3$9.99
- Coins 5$14.99
- Diamonds 5$19.99
Questions
Is Keep On Line free?
Is MX Engines free?
Which has better reviews, Keep On Line or MX Engines?
Do Keep On Line or MX Engines have ads?
Which is updated more often, Keep On Line or MX Engines?
Other comparisons
