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InkOrb

Physical ball painting: layers, pigment mixing, export.
New in version v509 · 2026-10-03
• Smaller app (unused code removed)
InkOrb is a physics-based ball painting studio: instead of a regular brush, a ball rolls across the canvas and leaves a trail of paint behind it, precise or chaotic depending on speed and gesture.

Features:
• Regular brush and pencil, alongside physics balls
• Draw your own obstacles, place planets (with gravity) and portals: the ball goes in one and comes out the other
• Create custom balls, in addition to the built-in ones (comet, rainbow, bouncy...), each with its own trail and fade settings
• Gyroscope: tilt your phone to guide the ball
• Layers, selection, eraser, undo/redo
• Pigment mixer (OKLCh color wheel) to compose your own colors instead of picking from a fixed palette
• Export your artwork as an image
• Built-in kid mode: switch to KidOrb in one tap for a stripped-down version made for young children
• Interface available in English and French

No ads, no accounts, no network connection: InkOrb runs fully offline and collects no usage data.

InkOrb is the full edition of the same engine as KidOrb (physics-based ball painting), without the limitations made for young children: every tool, obstacle, planet, portal and the gyroscope are available from the first launch.

Versions

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

Download F-Droid
  • Version v509 · 2026-10-03 (509) suggested Added on Oct 16, 2026

    This version requires Android 7.0 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions
    • read the contents of your shared storage
      Allows the app to read the contents of your shared storage.
    • modify or delete the contents of your shared storage
      Allows the app to write the contents of your shared storage.
    • com.wian.inkorb.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 383 KiB PGP Signature | Build Log