Forge Slicer
On-device 3D print slicer
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
A complete 3D print slicer that runs entirely on your iPhone. Import an STL, slice it, preview the toolpaths, export G-code. No cloud, no account, no upload.
Forge is a complete 3D printing slicer that runs entirely on your iPhone.
Import an STL, place it on the bed, scale and rotate it, slice it, preview the toolpaths layer by layer, and export G-code to your printer — no laptop, no account, no upload.
NOTHING LEAVES YOUR PHONE
Forge contains no networking code at all. Your models are parsed, sliced and exported on the device. There is no account to create, no cloud sync, no analytics and no ads. That is not a setting you switch on — it is how the app is built.
A REAL SLICER, NOT A VIEWER
- Draft, Standard and Fine presets to start from
- Layer height and first-layer height
- Wall count, top layers and bottom layers
- Five infill patterns — Lines, Grid, Triangles, Gyroid and Concentric — with adjustable density
- Nozzle and bed temperature, with a separate first-layer temperature
- Print speed control
- Automatic retraction and a first-layer skirt
- True top and bottom surface detection, so solid faces land where they belong
- Filament length, weight and estimated print time before you commit
SET UP FOR YOUR PRINTER
Bed width, depth and maximum height. Nozzle diameter. 1.75 mm or 2.85 mm filament. Heated or unheated bed. Origin at the corner or at the bed centre for delta machines and some cartesians.
SEE IT BEFORE YOU PRINT
Preview the generated toolpaths layer by layer. Scrub through the model and see exactly where walls, infill and solid surfaces go — before you commit filament to it.
EASY TO GET MODELS IN
Open an STL from Files, iCloud Drive, AirDrop, Mail or Safari — Forge appears in Open With across the system. Six sample models are built in, including a 20 mm calibration cube, so there is something to slice the moment you install it. A built-in list of model sites points you at Printables, MakerWorld, Thingiverse and Thangs.
EXPORT ANYWHERE
AirDrop G-code straight to your Mac, email it, or save it to Files and copy it to a USB drive or SD card. You can also export the edited mesh back out as an STL, with your scale and rotation baked in.
SHORTCUTS
Import, slice and open models from the Shortcuts app.
BUILT FROM SCRATCH
Forge's geometry kernel was written specifically for this app and is checked against a verification suite of solids with hand-computed answers. Integer-precision arithmetic means contours close reliably instead of almost closing.
Forge is free. No in-app purchases, no subscriptions, no ads.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, mark jent, 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 Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- mark jent
- Size
- 3.1 MB
- Category
- Graphics & Design
- Compatibility
Requires iOS 16.6 or later.
- iPhone
Requires iOS 16.6 or later. - Mac
Requires macOS 13.5 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Jent Innovations