# DrawPad Pro.stl — Easy sketch to 3D. Export STL. > Convert 2D sketches to 3D printable STL models on iPad. (iPhone/iPad app by Opticell Limited.) - Source: https://appshunter.io/ios/app/drawpad-prostl/id6762198897 (this page in markdown: same URL + `.md`) - Developer: [Opticell Limited](https://appshunter.io/developer/1883824295) - Category: Graphics & Design, Productivity - Price: $9.99 - Age rating: 4+ - Requires: iOS 16.0 · 4 MB - Languages: American English - Released: 2026-04-15 - Data updated: 2026-09-10 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/drawpad-prostl/id6762198897/reviews.md ## What is DrawPad Pro.stl? DrawPad Pro.stl turns your 2D sketches into 3D-printable models right on iPad. Draw a shape, tap Extrude, and watch the canvas itself tilt into a live 3D view — then export a watertight binary .stl file ready for your slicer. Built for makers, not five-year-olds. A precise outline pen, shape snap for exact primitives, layered text in any system font, and a real polygon triangulator that handles holes through your model. Designed from the ground up for Apple Pencil on iPad. — SKETCH TO 3D — • Draw closed outlines with a precision pen built on PencilKit • Shape Snap auto-cleans rough freehand into exact rectangles, circles, triangles, stars, polygons and more • Insert Shape — stamp clean primitives (circle, square, triangle, pentagon, hexagon, octagon, star, heart) by dragging their bounding box on the canvas • Layers for stacking multiple outlines, each of which becomes a separate 3D body in the exported model • Mirror & Pattern tool with vertical, horizontal, four-way and radial symmetry (2–16 slices) — draw one cog tooth, get the whole cog • Bucket fill for coloring your 2D designs, without breaking the vector strokes underneath — REAL 3D EXTRUSION — • Tap Extrude and the canvas tilts into a live SceneKit 3D view • Scrub the height slider to change the extrusion depth in real time • Orbit the model freely with a drag — fully-lit, physically-based shading, no loading screens • Holes through the model: draw a cog outer and a circle for the axle and the extruder produces a hollow body, not a filled disc • Smooth cylindrical walls — adaptive segment count means round shapes render as real cylinders, not faceted prisms — 3D TEXT — • Drop in text boxes using any system font installed on your iPad • Glyphs are extruded as true 3D letters with correct holes in O, A, B, D, P, R — powered by SceneKit's glyph tessellator • Drag to reposition, two-finger edit content, pick from a searchable font picker with live preview — EXPORT STL — • Writes industry-standard binary STL files • Compatible with Cura, PrusaSlicer, Bambu Studio, OrcaSlicer and every mainstream 3D printer • Share directly to Files, AirDrop, email, or any installed slicer app • The geometry you see on screen is exactly what ends up in the file — PRO TOUCHES — • Built exclusively for iOS 16 and later on iPad and iPhone • Apple Pencil support with pressure-aware strokes and palm rejection • Autosave catches you if the app is swiped away mid-sketch • No subscription, no ads, no in-app purchases, no analytics, no tracking • Works completely offline — your designs never leave your device DrawPad Pro.stl is a one-time purchase. Your first 3D print starts with a sketch. ## Key features - Draw closed outlines with precision pen - Shape Snap for exact primitives - Layered outlines for separate 3D bodies - Real-time 3D extrusion with height slider - Export watertight binary STL files - Apple Pencil support with pressure sensitivity - Works completely offline ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/drawpad-prostl/id6762198897/reviews.md ### 5/5 — Really good *2026-08-06* Used this to draw up some 3D projects to print. So many features that I haven’t begun to explore but found great for what I have needed so far. ## Frequently asked questions about DrawPad Pro.stl ### What is DrawPad Pro.stl? DrawPad Pro.stl is an iPad application that allows users to draw 2D sketches and convert them into 3D models. These models can then be exported as STL files, ready for 3D printing. ### How does DrawPad Pro.stl turn sketches into 3D? Users draw closed outlines, then use the 'Extrude' feature. The app provides a live 3D view where the extrusion height can be adjusted in real time, creating the 3D model. ### What file formats can DrawPad Pro.stl export? DrawPad Pro.stl exports industry-standard binary STL files. These files are compatible with all mainstream 3D printers and slicer software like Cura and PrusaSlicer. ### Does DrawPad Pro.stl support Apple Pencil? Yes, DrawPad Pro.stl is designed exclusively for Apple Pencil on iPad, offering pressure-aware strokes and palm rejection for a precise drawing experience. ### Is DrawPad Pro.stl available on iPhone? Yes, DrawPad Pro.stl is built for iOS 16 and later and is supported on both iPad and iPhone devices. ### Does DrawPad Pro.stl have ads? No, DrawPad Pro.stl is completely ad-free. The app states it has no ads, no subscriptions, no in-app purchases, and no tracking. ### How much does DrawPad Pro.stl cost? DrawPad Pro.stl is a one-time purchase priced at $9.99. There are no ongoing subscription fees or in-app purchases. ### Can I use DrawPad Pro.stl offline? Yes, DrawPad Pro.stl works completely offline. Your designs are saved locally on your device, ensuring privacy and accessibility without an internet connection. ## Version history (last 5 releases) ### 1.6.1 — 2026-07-07 Fixes an issue where black and white pen colours were swapped when the device was set to Dark Mode — black ink drew invisibly on the white canvas. Your existing artwork is unaffected and displays correctly after updating. ### 1.6 — 2026-07-06 Undo that survives relaunch, print-weight estimates, and a smoother, steadier canvas. • Undo that survives — Your undo history is now saved with each project. Load a project and keep stepping back through the session you saved it in; closing the app no longer wipes the timeline. • Print estimates — The 3D Workshop dimensions readout now shows your model's exact volume and estimated print weight, and every STL export reports volume, grams of PLA / PETG, and metres of filament alongside the print-readiness score. Know what a print costs before you slice it. • Fixed: quick text and the keyboard — The tools sheet now lifts above the keyboard while you type, so the Quick Text field and Place button stay visible. Drag the list down to tuck the keyboard away. • Fixed: smoother layers on iPad — Background layers now render only what you actually drew, ending the slowdowns and freezes some layered drawings hit on iPad. • Fixed: autosave no longer causes a brief hitch while you draw — saving now happens entirely in the background. • Fixed: imported photos now export in the position you placed them, instead of snapping to the canvas corner. Bucket Fill remains paused while we finish rebuilding it — it will return in a future update. Thanks for printing with DrawPad Pro.stl. ### 1.5 — 2026-07-02 What's New in Version 1.5 - A cleaner, faster canvas with the same one-tap access to 3D. • Redesigned tools menu — Tools now slide up in a polished bottom sheet with a grab handle and a dimmed backdrop. Tap the handle or anywhere outside to dismiss. More room, smoother scrolling. • Push-to-clear — Touch and hold the + button to clear your canvas. A red ring fills as you hold, so there are no accidental wipes — release early to cancel. • Tidier header — Layers, projects, export, share, text, and help now live under a single ••• menu, so the top bar stays clean. Extrude stays right where you need it, front and center. • Loaded-image pill — When you're tracing over a reference photo, a quick pill shows it's active — tap once to remove the background without touching your drawing. • Polish and stability improvements throughout. ### 1.4 — 2026-06-12 The 3D Workshop grows up — this one's for the printing hobbyists who've been with us from the start. New: • Vertical Split is here. Designs wider than your printer's bed now split into 2–5 side-by-side segments with puzzle interlocks carved right into the cut: knobs for alignment, tabs for registration, or dovetails that slide together from above and lock against pulling apart. The female side of every joint is sized by your chosen fit (Loose / Press / Glue), cuts automatically steer around holes in you design, and rings split into C-pieces — not solid halves. Export the set and print one segment per plate. • Fitting keys. Flip one toggle and instead of carved joints, BOTH sides of every cut get sockets and separate key pieces print alongside — dowel pins for stacked splits, bowtie keys for vertical ones — bridging each joint for a solid, positive-locking assembly with flush cut faces. Keys export as their own STL in the set. • A real build plate. Your model now sits on a 220 × 220 mm bed with a millimetre grid, just like your slicer — so you can tell at a glance how big the print is and whether it fits. • View buttons. Jump straight to Top, Front, Side, or 3D views, or tap Fit to frame your model — no more orbiting off into space. • Tap any object to select it (it glows blue) and a full properties panel appears: spin, tilt on two axes with 15° snapping, scale, and 1 mm nudge arrows. • Drop to Plate and Lay Flat buttons put your part flat on the bed, ready to print — perfect after tilting or importing a model. • Live dimensions. A readout shows the exact width × depth × height in millimetres for the selected object or the whole scene — the same numbers your slicer will report. • Models render with realistic physically-based shading, so the preview finally looks like the print. Fixed: • What you arrange is now what you print. Moves, rotations, scales, duplicates, hidden objects, and imported 3D files are all baked into the exported STL. Previously the export quietly ignored the workshop arrangement. • Rotating an object now spins it in place. It used to swing around a far-off point like a tetherball. • Two-finger drag now moves objects across the plate and follows your finger from any camera angle. Dragging used to lift parts into the air and invert after orbiting. • Duplicates no longer vanish when you adjust a slider. • Imported 3D files land where the file says they should, and they export along with everything else. • Orbit below the plate and it fades away so you can inspect the underside of your model. Thanks for printing with DrawPad Pro.stl. ### 1.3.2 — 2026-05-07 Version 1.3.2 — Stability Update This release focuses on iPad reliability. We squashed a batch of crashes and visual glitches reported by users: • Undo no longer blanks the canvas. Tapping the back/undo button while working with multiple layers used to occasionally wipe the canvas to white. Fixed. • Zoom is rock-solid. Pinch-zooming and the +/− zoom buttons no longer crash the app, even during rapid gestures or right after launch. • Finger panning works again. Moving strokes with the Hand tool no longer crashes when panning with your finger on iPad. • Importing photos as layers is reliable. Large photos from the camera roll no longer crash the app, and failed imports now show a clear message instead of failing silently. Photos are also now downsampled for faster, smoother editing. • Text extrusion improvements. Extruding text that includes Chinese, Japanese, Korean, emoji, or other scripts no longer crashes. Thanks for the bug reports — please keep them coming. ## More apps by Opticell Limited - [DrawPad](https://appshunter.io/ios/app/drawpad/id6760317949) - [WalkFindr](https://appshunter.io/ios/app/walkfindr/id6760369032) - [Hanyu: Learn Chinese Mandarin](https://appshunter.io/ios/app/hanyu-learn-chinese-mandarin/id6760541929) - [MyLLM - Local AI Agent](https://appshunter.io/ios/app/myllm-local-ai-agent/id6760704297) - [LinkFindr](https://appshunter.io/ios/app/linkfindr/id6760857542) - [E-Grid](https://appshunter.io/ios/app/e-grid/id6761284626) All apps by Opticell Limited: https://appshunter.io/developer/1883824295 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-10.*