Keep On Line

Contains adsIn-app purchases
Content rating
Everyone
0+
Downloads
Content rating
Everyone
In-Game Purchases
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About this game

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.
Roll through little worlds. Stay on the line. Find your flow.
Updated on
Oct 24, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    Location, App activity and 2 others
  • This app may collect these data types
    Location, App activity and 2 others
  • Data is encrypted in transit
  • Data can’t be deleted

What’s new

Eight new gem marbles and six trails. Challenge, daily gift and mission rewards are rebalanced, with optional score-card frames. Daily gift reminders now ask after your first run. Improved touch and tilt controls.
Content rating
Everyone
In-Game Purchases
Learn more

App support

About the developer
NEXTGEN SOFTWARE LLC
info@nextgensoftware.us
22796 Marbella Cir Boca Raton, FL 33433-3850 United States
+1 561-404-7498