Linearity Curve Graphic Design vs Preview3D
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Linearity Curve Graphic Design
Create professional vector art and graphic designs on your mobile devices. This app offers powerful tools for drawing, illustration, and photo vectorization, allowing you to design logos, marketing materials, and digital art with precision and ease.
- Bezier Pen and Node tools
- Auto Trace for vectorizing images
- Layer system with blend modes
- Apple Pencil support
- Cloud sync across devices
- Import and export industry formats
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Professional vector art and graphic design software on iPad and iPhone! Linearity Curve (formerly Vectornator) is a powerful vector graphics editor built for iPad, Mac, and iPhone. Create stunning vector art with precision Bezier tools, design complex illustrations with a full layer system, and vectorize photos or sketches into clean SVG files in seconds. From logos and brand systems to marketing graphics and digital art, Curve gives you professional graphic design tools wherever you go. VECTOR DRAWING TOOLS FOR PROFESSIONAL WORKFLOWS - Bezier Pen and Node tools for smooth, editable vector art at any scale - Shape Builder combines and subtracts shapes with a single tap - Boolean operations for complex graphics compositions - Smart guides and customizable grids for pixel-perfect alignment - Text on path for curved headlines and creative type layouts - Multiple artboards for logos, posters, pitch decks, and full campaign designs VECTORIZE ANY IMAGE WITH AUTO TRACE - Instantly trace and vectorize sketches, photos, illustrations, or scanned artwork into editable vector paths - Background Removal isolates subjects from any image in one tap - Convert PNG, JPG, or any image to clean, organized SVG vector files - Export SVG, AI, PDF, PNG, JPG, and TIFF with properly grouped layers - Full RGB and CMYK color support for screen and print production ADVANCED ILLUSTRATION AND DIGITAL ART TOOLS - Create custom vector brushes for a unique and consistent style - Gradient tools with linear, radial, and mesh-style - Layer system with blend modes, opacity, and masking for complex graphics - Eyedropper and saved color palettes for consistent brand colors - Snap to grid, guides, and objects for precise vector drawing BUILT FOR IPAD AND IPHONE - Apple Pencil support for natural, pressure-sensitive vector drawing - Touch-optimized interface designed for mobile creativity - Gesture-based navigation for fluid canvas control - Optimized for all iPad and iPhone screen sizes - Cloud sync keeps projects upd Native iOS performance — fast, responsive, and fluid on every device Contact: support@linearity.io Privacy: linearity.io/privacy-policy Follow us: @linearityhq
Preview3D
View and inspect a wide range of 3D file formats natively on your iPhone and iPad. Supports CAD, mesh, and 3D printing files with detailed information and AR capabilities. Offline functionality ensures privacy and speed.
- Native viewer for STEP, STL, 3MF, G-code, and more
- Detailed model inspection (dimensions, volume, surface area)
- Full-color 3MF rendering
- Augmented Reality (AR) Quick Look integration
- Offline functionality, no account or web uploads
- Quick Look and 3D thumbnail support in Files app
- Universal purchase for iPhone, iPad, and Mac
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Preview3D is a fast, native iPhone and iPad viewer for the 3D formats you actually use — from CAD to mesh to 3D printing — in one clean window. Open a STEP file from a vendor, a painted 3MF from your slicer, or an STL someone sent you, and see it instantly — in the app, or right in the Files app with Quick Look and 3D thumbnails. No web uploads, no account, no clutter. SUPPORTED FORMATS • STEP / STP, STL, OBJ, PLY • glTF / GLB, USDZ / USD, COLLADA (DAE) • 3MF — including painted multi-material prints • FBX, 3DS, X3D, LWO, MS3D, AC, AMF, OFF and more (via Assimp) • G-code and PrusaSlicer binary G-code (.bgcode) REAL STEP SUPPORT Preview3D reads STEP with a pure-Swift B-rep kernel: watertight tessellation and crease-aware normals straight from the exact geometry, so cylinders stay smooth and edges stay crisp. Files that carry colors (STYLED_ITEM) render each part in its assigned color. INSPECT Open the info panel for bounding-box dimensions, volume, surface area, watertightness and structure — solids, faces, edges, triangles and vertices. 3D-PRINTING FILES Open your slicer's G-code or PrusaSlicer .bgcode, orbit the print toolpath in 3D, flip to the embedded preview image, and read the print stats — time, filament, weight, layer height and material. 3MF, IN FULL COLOR Multi-material painting from PrusaSlicer and Bambu Studio is decoded and rendered in its filament colors — including fine sub-facet brush detail — so you can preview a finished multi-color print before it leaves the slicer. Colors written into a 3MF by CAD tools and converters show too. SEE IT IN YOUR ROOM View any model in AR with AR Quick Look — place it on your desk or the floor and walk around it. SCAN A CODE, SEE THE MODEL A Preview3D QR code next to a printed model opens it in 3D and AR — even for someone who hasn't installed the app, through an App Clip. Make codes for your own Printables models, free, at preview3d.xfanta.com/qr. QUICK LOOK & THUMBNAILS Preview supported files right in the Files app, and get real 3D thumbnails — including STEP, painted 3MF, COLLADA (DAE), FBX and 3DS that iOS can't render on its own. Keep your models in the Preview3D folder in Files and reopen them anytime. SHARE Send a PNG snapshot of the current view to any app. Placing a model in AR? Share it as USDZ right from there. BUILT FOR IPHONE AND IPAD A real native app built on SceneKit and Metal — quick to launch, quick to orbit. Fully offline: everything runs on your device, no account, no network. iOS and iPadOS 17 or later. BUY ONCE, USE EVERYWHERE Preview3D is a universal purchase: one purchase covers the iPhone, iPad and Mac apps. The Mac version adds PMI / GD&T (AP242) reading, assembly trees with per-part isolation, and one-click conversion to STL, OBJ, GLB and USDZ. Note: measurements are produced by automated tessellation and are provided for convenience — always verify against your authoritative CAD source for manufacturing-critical work.
Screenshots
Verdict
The clearest difference is price: Linearity Curve Graphic Design at Free against Preview3D's $9.99. Preview3D's advantage is review sentiment (100% vs 61%) and in-app purchases (none vs 18). On update cadence, ads, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Linearity Curve Graphic Design is free to download; Preview3D costs $9.99 up front. Linearity Curve Graphic Design sells 15 in-app purchases, starting at $7.99 per 7 days. Preview3D asks for nothing beyond the download.
Linearity Curve Graphic Design ships an update every 9 days, Preview3D weekly. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.
| Parameter | Linearity Curve Graphic Design | Preview3D |
|---|---|---|
| Price | Free — better | $9.99 |
| Rating | 4.5 (14K ratings) — better | — |
| Positive reviews | 61.4% of reviews | 100.0% of reviews — better |
| Number of ratings | 14K — better | — |
| Update frequency | Every 9 days | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Best chart rank | #167 | #54 — better |
| Devices | iPhone, iPad, Mac | iPhone, iPad, Mac, Vision Pro — better |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 797 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Linearity GmbH | Michal Fanta |
Customer experience
Linearity Curve Graphic Design
Preview3D
Bugs and requests
Linearity Curve Graphic Design
Reported bugs
4 issues- Inconsistent behavior when using the pen tool
- Issues with resizing and manipulating text boxes
- Problems with the auto-trace feature producing inaccurate results
- Crashes and data loss when working on large or complex projects
Requested features
6 requests- Add symmetry drawing option
- Improve text editing capabilities (e.g. line spacing, kerning)
- Introduce more brush and gradient options
- Allow importing vectors as layers
- Add measurement tools (e.g. line length, angle)
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- Improve canvas rotation and locking functionality
Preview3D
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Linearity Curve Graphic Design
- Weekly$7.997 Days
- Weekly$9.997 Days
- Linearity Pro (Monthly)$14.991 Month
Show 12 moreShow fewer
- Monthly2 variants$14.991 Month
- Linearity Pro (Monthly)7 Days trial$14.991 Month
- Yearly7 Days trial$39.001 Year
- Yearly$39.001 Year
- Yearly7 Days trial$49.991 Year
- Yearly7 Days trial$59.991 Year
- Yearly7 Days trial$74.991 Year
- Yearly7 Days trial$79.991 Year
- Limited-time offer (Yearly)7 Days trial$96.001 Year
- Yearly7 Days trial$96.001 Year
- Linearity Pro (Yearly)$119.991 Year
- Yearly7 Days trial$119.991 Year
Preview3D
No in-app purchases
Questions
Is Linearity Curve Graphic Design free?
Is Preview3D free?
Do Linearity Curve Graphic Design or Preview3D have ads?
Which is updated more often, Linearity Curve Graphic Design or Preview3D?
Which is more popular, Linearity Curve Graphic Design or Preview3D?
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