Concepts App Review: The Infinite Canvas Architects Actually Use

The Concepts App is an infinite canvas sketching tool built around editable vector strokes, precision guides, and CAD friendly exports. Architects use it for everything from napkin concept sketches to scaled schematic drawings on iPad, Windows, and Android, sitting between freehand drawing and full drafting software.

Plenty of drawing apps promise to replace the sketchbook. Few hold up once you put a real project schedule behind them. After using Concepts on live design work, this review looks at where it earns its place in an architect’s toolkit, where it falls short, and whether the subscription is worth paying.

What Is the Concepts App?

Concepts is a sketching and design app made by TopHatch, Inc., available on iPad, iPhone, Windows, and Android. At its core sits an endless drawing surface paired with a vector engine, so a line you draw stays sharp at any zoom level and stays editable long after you put it down.

That combination is what separates the concepts drawing app from a paint program. In Procreate or most note taking tools, a stroke becomes fixed pixels the moment you lift the pencil. Here, every line keeps its properties. You can grab a wall sketched twenty minutes ago, change its weight, recolor it, or drag its endpoint, with no erasing and no redrawing. That single behavior reshapes how you work, because nothing you draw is ever locked in.

The app weighs in at around 247 MB and supports Apple Pencil, Surface Pen, and most active styluses depending on platform. Files sync across devices, so a sketch started on an iPhone during a site visit opens on a Windows machine back at the studio. For architects who move between hardware through the day, that continuity removes the usual export-and-email shuffle.

The app started as an iPad favorite and grew into something architects now treat as a daily concepts ipad app for early design thinking. It also doubles as a flexible concepts note taking app, since the same canvas handles meeting notes, redline markups, and quick diagrams without switching tools.

Why Architects Choose the Concepts App for Sketching

The pull is not the brush feel alone, though the pencils and pens are good. It is the way the Concepts App handles iteration. Design at the concept stage means drawing the same idea ten times. An infinite canvas plus editable vectors turns that repetition into adjustment instead of restarting.

The infinite canvas in practice

There is no page boundary. You can sketch a site plan, then scroll left and rough out three building sections beside it, all on one surface. For studying a campus or a row of unit options, this beats juggling separate artboards. The canvas keeps related thinking in one visual field, which matters when you present alternatives side by side.

Infinite layers back this up. You can stack site, massing, circulation, and annotation on separate layers, then dim or hide whole sets while talking a client through options. If you have weighed up other tablet drawing tools, our look at the best architecture apps for iPad puts this layer flexibility in context against the wider field.

Vector strokes you can actually edit

The vector-raster hybrid is the feature architects mention most. Selection tools let you reshape, rescale, copy, and recolor existing geometry. Sketch a window once, duplicate it across a facade, then resize the whole run when the floor-to-floor height changes. The designer COPIC color set is built in, so your linework reads in recognizable presentation tones rather than flat defaults.

This editability is also why Concepts works for refinement, not just first ideas. A loose study can tighten into a scaled diagram inside the same file. For a wider view of how digital tools compare for this kind of work, our roundup of the best tools for digital architectural sketching covers the alternatives worth testing.

Does it work as a note taking app?

Yes, and a fair number of architects use it that way. The same surface that holds a floor plan handles meeting notes, redline markups on a printed PDF, and quick diagrams during a call. Because the canvas never runs out, you are not boxed into a page, so a single project file can grow from rough notes into developed drawings. As a concepts note taking app it is heavier than a plain text tool, but for visual thinkers who mix words with sketches, that weight is the point. The brush library covers pencils, pens, wire, and custom brushes, so notes and drawings share one consistent feel.

Precision Tools That Bridge Sketch and CAD

A sketch app that ignores measurement is useless for architecture. This is where Concepts pulls ahead of pure illustration tools, and where the gap with raster apps becomes obvious.

Snap, Measure, and Scale

Concepts includes Snap, Measure, Scale, and Shape Guides, plus isometric and perspective grids you can edit. You set a real-world scale and draw to it, with snapping that keeps lines aligned and a measure readout that confirms dimensions as you go. Shape Guides straighten freehand strokes into clean lines, arcs, and ellipses when you need them, while still letting you sketch loosely when you do not.

Export options for CAD and BIM handoff

You can import, mark up, and export PDF plans, and export drawings to PDF, SVG, PNG, and DXF. The DXF export is the one that earns the app a real workflow slot, since your sketched geometry lands back in CAD as editable lines rather than a flat image. Presentation Mode adds live sketching with a team or over a video call, useful for remote design reviews.

Concepts App Pricing and Plans

Concepts is free to download with in-app purchases, which is where buyers tend to get confused. The free tier limits you to five layers and a basic brush set, enough to test the feel but not to run real project work. Past that, you choose between a one-time purchase and a subscription.

The Essentials pack is a one-time purchase of $39.99 and opens up the core toolset. The full Everything plan runs $4.99 per month or $29.99 per year and adds the complete feature library, including ongoing additions. A Teams option is priced around $10 per month or $100 per year per teammate for shared libraries and collaboration. For students and architects comparing running costs, that subscription model is the main sticking point, especially next to one-time purchase rivals.

If a flat fee matters more to you, our Procreate for architects review covers a strong one-time-payment alternative, and the best free architecture apps for iPad guide lists options that cost nothing to start.

Concepts App Review: Pros and Cons

After real project use, the trade-offs are clear. The table below sums up where the app delivers and where it frustrates.

How Concepts Compares to Procreate and Morpholio Trace

Most architects do not pick one app. They run two or three. Concepts, Procreate, and Morpholio Trace cover overlapping but distinct jobs, and knowing the split saves money.

Procreate is a raster painting app. It wins on brush feel and presentation renders, paint-overs, atmospheric perspectives, and texture. It cannot draw to scale or export DXF, and it stays iPad only. Concepts trades some brush warmth for editable vectors and measurable geometry, which is the better fit for design development rather than final illustration.

Morpholio Trace leans into overlay and trace workflows, marking up imported plans and photos with CAD-like rulers. Concepts and Trace genuinely compete for the schematic sketching slot, while Procreate sits apart as the rendering tool. If you want to see how the whole group lines up, our breakdown of mobile drawing apps for digital drawing and sketching maps the strengths of each.

One practical difference settles many buying decisions: platform reach. Trace and Procreate are iPad only, while Concepts runs on Windows and Android too. If your studio mixes Surface tablets with iPads, that breadth keeps everyone on one file format. The flip side is that the deep tool set takes longer to learn than Trace’s tighter feature list, so a first session can feel busy. Most architects settle in after a week of real project use, once the gestures and selection tools become muscle memory rather than menu hunting.

Who Should Use Concepts (and Who Should Not)

Concepts fits architects who think on the canvas and want that thinking to carry forward. If you sketch options early, iterate constantly, and need geometry that exports back into CAD, the subscription pays for itself in saved redraw time. The cross-platform reach also helps studios where not everyone is on an iPad.

It is the wrong pick if you mainly produce painterly presentation images, in which case a raster app serves you better, or if you need full construction documentation, which belongs in dedicated CAD or BIM software. The honest read from this concepts review is that the app is a strong front-end for design, not a one-stop replacement for your whole drawing stack.

Pricing reflects the App Store and Concepts plan tiers listed at the time of writing and may change by region and over time.

Final Thoughts

Bottom Line: The Concepts App earns its reputation among architects because it closes the gap between a loose first sketch and a scaled drawing CAD can read. The subscription is the real friction point, and the free tier is too thin for serious use, but for design-stage thinking the editable vector workflow is hard to match. Treat it as the sketch-to-schematic layer of your toolkit, pair it with a renderer and a CAD package, and it holds its spot.

For broader context on building out an iPad based design setup, the official Concepts for architects page details the current feature set, the Concepts App Store listing shows live ratings and pricing, and ArchDaily’s roundup of the top apps for architects places it among the wider field of professional tools.