Hollowline: Tunnel Ball Rush

One-Finger Reflex Runner

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

Crash, watch one short video and roll on from the exact spot you hit. 120 levels across 6 worlds, and never an ad in the middle of a run. Press anywhere and the ball starts rolling. Slide your finger to steer it through a glowing tube that bends, narrows and fills with obstacles. Let the ball hit a wall and the run is over. Hollowline is built around one rule: every stretch of track you see has been checked before you see it, so every gap can be cleared with one finger. When you fall, it was the line you took, not the level. WHAT IS INSIDE • 120 levels in a single Journey across 6 worlds, from Abyss Reef to Candy Reactor • Flow mode: an endless run for when you just want to keep going • A daily challenge on the same track for everyone • 18 ball cores to collect with the sparks you pick up along the way • Near-miss moments that reward cutting it close CRASHED? ROLL ON A crash does not have to end the run. The big button on the card plays one short video and puts the ball back on the track right where it hit; if the video will not load, you get that revive anyway, once per run. Would rather start over? The small retry button is always there: a level's first retry is free, later ones play a video. No ad ever cuts into a run. Now and then a short one plays between runs, and a video can double the sparks a run earned. EVERY LEVEL REMEMBERS YOUR BEST Each level keeps its three medals and the furthest point you have reached, so the card after a crash shows how close you came. Flow and the Daily keep their best distances, and your day streak and cores are kept with them in the game on this iPhone. One finger. One ball. How far can you roll?

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

Crashed? The big button now plays a short video and puts you back exactly where you hit. If no video loads, that revive is on us once per run.

Version 1.0.2

The developer, Ozkan Yilmaz, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers
    • Usage Data

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Identifiers
    • Usage Data
    • Diagnostics

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Location
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
Özkan Yilmaz
Size
177.5 MB
Category
Action
Compatibility
Requires iOS 15.0 or later.
  • iPhone
    Requires iOS 15.0 or later.
  • iPod touch
    Requires iOS 15.0 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English
Age Rating
4+
Copyright
© 2026 AppFellas
  • Developer Website
  • Privacy Policy

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