Concepts: Sketch, Note, Draw

Review by eFreeware

Most sketching apps treat a line as a line: once it is down, it is down. Concepts takes the other route. Every stroke is vector, which means the marks you make stay editable and scalable, and the Nudge, Slice and Select tools let you move or reshape an element without starting over. That single decision shapes everything else about the app, and it is the reason I would point anyone whose work involves iterating on ideas rather than producing a finished drawing in one sitting toward it.

The app is built around an infinite canvas, and it is meant for the stage before something is finished: planning, whiteboarding, notes, doodles, mind maps, storyboards, product sketches and designs. That is a wide brief, but a coherent one. It sits in the Art & Design category and is free to install, with a 4.4 average across more than 24,000 ratings. It has been available since November 2018 and has been updated as recently as October 2026, so this is a project that is still being worked on rather than left to sit.

If you draw for a living, or you plan and diagram often enough that you want the flexibility to revise, this is the kind of tool that rewards a little setup. If you want a simple place to jot a quick note and move on, the scope here is larger than that job needs.

What drawing on an infinite canvas actually feels like

The canvas does not end. You can sketch out a plan, push a section off to the side, come back to it later, and the space is still there. Paper types and custom grids give the surface some structure, so a grid can sit under a product sketch while a plain sheet sits under a mind map. Because the work is vector, zooming in does not reveal a pixelated edge; strokes scale and stay clean.

The drawing tools are the part I find most interesting in principle. The pencils, pens and brushes react to how hard, how tilted and how fast the stroke is, and live smoothing can be adjusted so a quick stroke ends up tidier. That combination is what separates a sketching app from a note-taking app, and it is the reason the app is pitched at people who care how a line looks, not just where it goes.

Layers behave as you would expect, with no limit on how many you add, automatic sorting and adjustable opacity. You can stack a rough underlayer, a cleaner pass above it, and a color block above that, then dial opacity to see through them. For anyone who thinks in revisions rather than single passes, this is the structure that makes the rest of the app usable.

Editing without redrawing: Nudge, Slice and Select

This is where the vector approach earns its keep. Nudge moves an element; Slice cuts through one; Select isolates what you want to change. The developer's claim is that you can adjust any element of a sketch by tool, color, size, smoothing and scale without redrawing it, and that is the promise the whole app rests on. If you have ever drawn a chair, decided it should sit two inches to the left, and erased half the page to make it happen, the appeal is obvious.

There is a similar logic in the precision tools. Shape guides, live snap and measurement let you place a clean line or a measured distance instead of eyeballing it, which matters for product sketches, floor plans and anything where proportions need to hold. The tool wheel or bar can be customized with your favorite tools and presets, and gestures are configurable too, so the app can be arranged around how you work rather than the other way around.

Duplication is the quiet third piece. You can copy work in the gallery or on the canvas, which makes iterations cheap: keep the version you like, branch a copy, and try something else. You can drag an image directly onto the canvas to use as a reference or to trace over, which suits sketching on top of a photo or a screenshot.

Color, brushes and the look of a sketch

Color selection is more considered than in most sketching tools. There are HSL, RGB and COPIC color wheels, and the COPIC spectrum is included in the free tier alongside the other two. The developer describes the wheels as a way to choose colors that look good together, which is a fair description of why a color wheel beats a hex field when you are sketching rather than matching a brand palette.

The brush library is the part that splits free from paid. Realistic pencils, pens and brushes are part of the core experience, but professional brushes are sold separately as a one-time purchase. If your work depends on a specific brush feel, that is a cost to plan for rather than a rounding error.

The rest of the paid picture is worth laying out plainly. A subscription opens up the full set of libraries, services and features, brings new updates over time, and covers Android, ChromeOS, iOS and Windows, so one plan works on all four. There is a seven-day free trial of premium. The other option is a one-time purchase of Essentials, which opens up selection and editing tools, unlimited layers, shape guides, custom grids, and export to PNG, PSD, SVG and DXF. That purchase is limited to the platform you buy it on, so a lifetime unlock on one device family does not follow you to another.

What the free tier gives you, and what it asks for

Free gets you endless sketching on the infinite canvas, a selection of paper, grid types and tools, the full COPIC spectrum plus RGB and HSL wheels, five layers, unlimited drawings and JPG exports. That is a workable starting point for note-taking, doodling and simple sketches. The five-layer limit is the constraint that will bite first if you build up complex work, and the export format list is narrower than the paid one.

The app is built for the newest pen-enabled devices and Chrome OS, which hints at where it works best. The developer describes the result as fast, smooth and responsive on pen-enabled hardware. On a phone without a pen, the same tools are there.

There is no advertising in the app, and it is free to install. Recent releases have addressed problems with signing in, buying items, managing folders and creating objects, and have refined the Object Library and added support for Android's per-app language settings, so the app is still being maintained.

The kind of work this fits

The strongest fit is someone who thinks by drawing and revises as they go. A product designer sketching a form, an illustrator working out a composition, a planner mapping a process, a student building a mind map for a paper: all of these benefit from strokes that stay editable and a canvas that does not run out. The developer notes that creators at Disney, Playstation, Philips, HP, Apple, Google, Unity and Illumination Entertainment use the app, which is a strong signal about the professional end of that audience.

It also suits people who want their sketch to leave the app in a useful form. Exports cover images, PDFs and vectors, and the paid tiers add PNG, PSD, SVG and DXF.

The people I would expect to bounce off it are those who want a quick, thoughtless note surface. Concepts asks you to set up tools, gestures and presets to get the most from it. It is a workspace, not a sticky note, and it behaves like one.

Is Concepts worth installing?

For anyone whose work involves iterating on a drawing, yes. The vector engine, the editing tools and the infinite canvas add up to something genuinely different from a raster sketchpad, and the free tier is enough to find out whether the workflow suits you before you pay anything. Install it, sketch something, and try nudging a line you have already drawn. That one action tells you more than any feature list.

The cost question is the one to think through. The subscription is the broadest option, carrying across Android, ChromeOS, iOS and Windows with every library, service and feature, and it starts with a seven-day trial. The one-time Essentials purchase is the cheaper route for a single platform, but it stays on that platform, and professional brushes are a separate purchase on top. If you work across a tablet and a desktop, the subscription math is easier; if you work on one device, Essentials may be enough.

I would put Concepts in front of designers, illustrators, planners and students who want their sketches to stay workable, and who do not mind spending a little time arranging the app around their habits. It has a large install base, a 4.4 average and a long update history behind it, which is reassuring for a tool you might come to depend on. The free version is the right place to start.

What's new in version 2026.09.3

2026.9 – Smoother, Sharper, Better We’ve squashed crashes and errors around sign-in, purchases, folders, and object creation to keep your workflow seamless. The Object Library gets a bit more polish with clearer copy, revamped mini stores, and an improved post-purchase experience. We also now support Android's per-app language settings. Read more at https://concepts.app/android/roadmap. If you appreciate what we’re doing, send us feedback or leave a review!