Unofficial community port · v0.1 preview

The real OrcaSlicer, on Android.

Not a companion app and not a rewrite. The same slicing engine and the same interface as the desktop version, compiled natively for Android phones and tablets and adapted for touch.

Download APK (arm64) Source on GitHub
Android 9+ · arm64 & x86_64 · AGPL-3.0 · based on OrcaSlicer 2.5.0-dev
OrcaSlicer on an Android tablet with a 3DBenchy on the plate
OrcaSlicer on an Android phone
Demo

From an empty plate to G-code.

Real screen recordings on a tablet and on a phone, sped up 1.6×: add a model from the long-press menu, move, rotate and scale it with a finger, look through the settings, then slice.

Tablet · 2560×1600
Phone · 1080×2400
Features

Everything you use on the desktop.

This is Orca's own code, so the features are the same: the profiles, the gizmos, every setting and the calibration tools.

Same slicing engine

libslic3r is built from upstream without changes, with the same algorithms, the same printer profiles and the same G-code as the desktop version.

Same interface

Orca's wxWidgets GUI runs on Android through wxWidgets' Qt backend: Prepare, Preview, gizmos, presets and the settings tabs.

Built for touch

Tap to select and drag to move. Long-press for context menus. Pinch to zoom, two fingers to pan, twist to rotate. Kinetic scrolling, and the back button closes dialogs.

Phones and tablets

Tablets get the full desktop layout. Phones get a compact one: settings full screen behind a "3D view" button, a vertical gizmo column, and compact bars.

System file picker

Open STL and 3MF files from local storage, Google Drive or any document provider through Android's Storage Access Framework.

Native and multi-core

Compiled C++ for arm64 with OpenGL ES 3 rendering. Slicing uses every CPU core through TBB, like the desktop version.

Screenshots

It looks like Orca because it is Orca.

Captured on Android emulators: a 2560×1600 tablet and a 1080×2400 phone. Orca follows the system's light or dark theme. Tap an image to enlarge it.

Prepare. The full desktop layout with the process settings on the left.
Long-press menus. Every right-click menu, here the plate menu with handy models.
Move. Drag an arrow with a finger, or type exact coordinates.
Rotate. The gizmos work exactly as on the desktop.
Every setting. Quality, strength, support and the rest, with presets.
Home. Recent projects and quick start.
3D view. Full screen, gizmos in a column.
Gizmos. Sized for fingers.
Settings. One tap away, with a "3D view" button back.
Menus. Long-press for the context menus.
Home. Stacked for narrow screens.
How it works

A port, not a rewrite.

OrcaSlicer's interface is written against wxWidgets. wxWidgets has no Android backend, but it has a Qt one, and Qt runs on Android. The port makes that chain work on a touch screen.

  • wxWidgets on Qt, fixed for AndroidDPI-correct painting, full-screen windows and on-screen dialogs, touch converted to mouse and gesture events, kinetic scrolling, and shared GL contexts for the 3D views.
  • OpenGL ES 3Orca's GLSL shaders are converted to GLSL ES, with a GLES loader and ES-safe render paths in the 3D scene and the G-code viewer.
  • Android servicesJava bridges for the system WebView and the Keystore. The native file picker handles content:// URIs, and saved files are copied back through the Storage Access Framework.
  • Two patches, pinned upstreamEvery change is kept as one patch for OrcaSlicer and one for wxWidgets, so the port can follow upstream.
OrcaSlicer GUIsrc/slic3r/GUI: Orca's own interface, with small __ANDROID__ layout tweaks
wxWidgets 3.3Orca's fork, wxQt backend + Android patches
libslic3rslicing engine, unchanged
Qt 6.8 Widgetsfor Android
Boost · TBB · CGAL · OCCT · OpenVDBcross-compiled with the NDK
AndroidOpenGL ES 3 / EGL · WebView · Storage Access Framework · API 28+
Get it

Install or build it yourself.

Preview builds are published on GitHub Releases. The whole port is open source under the AGPL, the same licence as OrcaSlicer.

Install the APK

  1. Download OrcaSlicer-android-arm64-preview.apk. It is the right file for almost every phone and tablet. Use x86_64 for emulators and Chromebooks.
  2. Allow your browser or file manager to install apps when Android asks.
  3. Open Orca Slicer. The first start unpacks the printer profiles, which takes a few seconds.

Requires Android 9 or newer and OpenGL ES 3.0. 6 GB of RAM or more is recommended for large models.

Build from source

# Linux host · Android NDK 29 · Qt 6.8.3 for Android · JDK 17
git clone https://github.com/LucasCoraca/orcaslicer-android
cd orcaslicer-android
./fetch-sources.sh        # pinned upstream + patches
./configure-deps.sh arm64-v8a && ./run-deps.sh arm64
./configure-wx.sh arm64-v8a
ninja -C build/wx-arm64-v8a install
./configure-app.sh arm64-v8a
./build-all.sh arm64-v8a  # → dist/*.apk

Prerequisites and environment variables are listed in the README.

Status

Preview quality, and improving.

Most of Orca already works on Android today.

Working
  • Model import (STL, 3MF), handy models and primitives
  • Selection, arrange, and the move, rotate and scale gizmos
  • All printer, filament and process settings, and presets
  • Slicing, with the result, the legend and the layer sliders
  • Setup wizard, Home page, menus and dialogs
  • Touch gestures and the compact phone layout

This is an independent, unofficial project. It is not affiliated with or endorsed by the OrcaSlicer team, Bambu Lab or SoftFever. OrcaSlicer is developed at github.com/OrcaSlicer/OrcaSlicer, and bugs in this port should be reported here, not upstream.