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Concepts: Smarter Sketching, Design & CAD for Architecture & Illustration

By TopHatch

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The future of professional design is here: Concepts intelligently combines paper + pencil with powerful vector manipulation. Make quick sketches, beautiful illustrations, and precise drawings with ease and style.

You’ll love the infinite canvas and layers, flexible multi-touch shape guides, vector manipulation with advanced transforms, and the ability to export your sketches to powerful standardized formats like SVG, PSD and CAD (DXF). Concepts sets the standard for productivity in the mobile era.

Concepts saves you time and enhances your creative capability. Use simple gestures like a tap-and-hold to select anything, and configurable shortcuts for unlimited undo, making adjustments, and accessing layers or the iconic COPIC Color wheel.

Concepts is optimized for the iPad Pro with Apple Pencil, and works brilliantly on iPad and iPhone so your sketchbook is always with you.

With our unique approach to precision sketching, amazing Architects, Illustrators, Professional Designers and Makers like you have designed hospitals and boats, landscapes, illustrations and game art, outlined major film storyboards, even crafted award-winning quilts, greeting cards, furniture, robots and drones!

Unlock the full power of Concepts with the Pro Pack:
- PRECISION TOOLS. Bring the power of CAD to your sketches through multi-touch shape guides, automatic measurements and snap-to sketching. We’ll do the math for you.
- ADJUST ANYTHING. Tap-and-hold any stroke or group to move, stretch, smooth, copy, delete, or change ink weight and color.
- ADVANCED TRANSFORMS. Distort, Perspective Warp and Skew. Concepts is the only app on iOS that provides the full desktop-class set, and does so with an incredibly simple interface.
- INFINITE LAYERS. Seriously. View them without losing context.
- POWERFUL EXPORTS. Send high-resolution (300dpi+) PNG, vector (SVG), CAD (DXF), Adobe Photoshop (PSD), and standard formats anywhere.

If you’re not ready to go Pro, the basic app includes:
- ELEGANT, CLEAN INTERFACE. We get out of the way, so you can focus on your sketch work.
- INFINITE CANVAS, SHARP ZOOM & ROTATION. Also Portrait and Split View multi-tasking.
- 5 LAYERS with intelligent separation.
- IMPORT IMAGES. Learn by tracing, or mark up images with notes to give feedback to coworkers.
- UNLIMITED PROJECTS. Never, ever stop sketching.
- COPIC COLORS. The beautiful color wheel will make you say ‘wow’.
- BLUETOOTH STYLUS SUPPORT. Connect your favorite stylus from Apple, FiftyThree, Adobe, Adonit, HEX3, Pogo or Wacom. Includes Palm Rejection. Full support for Apple Pencil on iPad Pro.
- GORGEOUS VECTOR BRUSHES. Pencil, Pens, Area Fills, Marker and Airbrush. All free.
- ADJUSTABLE PAPER with real-scale paper sizes, layout guides + rulers, transparency, graph paper and isometric grids.

Vector object packs for architecture, landscaping, UI design, industrial design, auto design, fashion design, sketchnoting, visual thinking and more are available separately via the in-app store.

Concepts is the pro-level design sketchbook that helps you break free from the desktop.

We're dedicated to quality and we update often. If you get stuck, chat with us in-app, pencil a note to, or find us anywhere with @ConceptsApp.

COPIC is the trademark of Too Corporation. Special thanks to Claudine Zafra, Lasse Pekkala and Erica Christensen for the architecture and illustration cover sketches!

What's New in Version 4.2.1


We love working for you designers. You appreciate quality, you give great feedback, and you’re very tolerant of iteration and change.

Lucky for us, you love the new Objects Library (and Advanced Transforms!), but you’d love it more if our professionally-designed packs were more accessible. So, we lowered the price and if you pick three, five, or ten object packs you'll save up to 25%.

You’ll save hours of work by dragging them off the menu and onto your drawings. Look out for new packs every few weeks based on your requests… coming soon are more objects for UI, landscaping, and things for fun, too.

If you appreciate color we added two new bits; one on the color wheel if there’s a color on your clipboard, and the second is a list of all the colors you’ve used in your drawing. Just scroll up on the recommended colors section to see an ordered-by-use list.

We also included fixes for Precision Scale + Rotate, grid rendering, measurements, transforms, added a “tap-to-dismiss” on those mostly-helpful pop-ups, updated Adobe Creative Cloud, and stapled that Undo button into place on the 12.9” iPad Pro.

We’d be ever-so-grateful if you added or updated your five-star review of Concepts. We’ll be back soon with more goodies, including the ability to make your own objects!

The Concepts Team @ TopHatch


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Customer Reviews


I like the app. I am loving what I have created so far. I would like to be able to choose from regular font to bold.

Excellent app

One of the best sketching apps i have found yet, and this was after trying several and reviewing lots of top ten lists. I use this app professionally for survey sketches and the only major improvement i complain about is the lack of PDF exporting, however the fact you can export CAD DXF files is excellent! Lots of features, the layering options, powerful tools and plenty of available tutorials are all plusses. 5 stars, highly recommended.

Concepts: Smarter Sketching, Design & CAD for Architecture & Illustration
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This app is designed for both iPhone and iPad
  • Free
  • Category: Productivity
  • Updated:
  • Version: 4.2.1
  • Size: 83.1 MB
  • Languages: English, Finnish, French, German, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese
  • Seller:

Compatibility: Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

We have not received enough ratings to display an average for the current version of this application.
All Versions:

Top In-App Purchases

  1. Pro Pack (All Devices)$10.99
  2. Pro Pack [Legacy]$10.99
  3. Pro Pack (iPhone Only)$5.49
  4. Precision Toolkit$2.79
  5. Shape Library$2.79
  6. Images & TextFree
  7. Upgrade to Pro Pack$8.49
  8. Layers & Adjust$3.99
  9. 3 Object Pack Credits$6.99
  10. 10 Object Pack Credits $20.99