Comparison

Concepts vs Cadmio

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Concepts

This flexible vector-based sketchbook offers an infinite canvas for ideation and design. Easily sketch, take notes, and create detailed designs with editable strokes and powerful tools. Share your work in various formats for seamless collaboration and professional output.

Highlights
  • Infinite canvas
  • Vector-based sketching
  • Realistic pens, pencils, and brushes
  • Editable vector elements
  • Unlimited layers
  • Scale and measurement tools
  • Object libraries
Features
Read full description

Think, plan & create – Concepts is a flexible vector-based sketchbook where you can take your ideas from concept to reality. Concepts reimagines the ideation process – offering a safe and dynamic workspace to iterate and explore your ideas, organize your thoughts, and experiment with designs. With our infinite canvas, you can: • Sketch plans and whiteboard ideas • Make notes, doodles, and mindmaps • Draw storyboards, product sketches and designs Concepts is vector-based, making every stroke editable and scalable. With our Nudge, Slice and Select tools, you can easily change any element of your sketch without redrawing it. Talented creators at Disney, Playstation, Philips, HP, Apple, Google, Unity and Illumination Entertainment use Concepts to develop and realize extraordinary ideas. Join us! Concepts has: • An infinite canvas with optional paper types and grids • Realistic pens, pencils and brushes that flow with pressure, tilt and velocity or create your own • A tool wheel or bar you can personalize • HSL, RGB and COPIC color wheels • Editable vector-based sketching – move, organize and edit the tool, color, size, scale, smoothing, opacity; transform or nudge lines to shape them • Unlimited layers • Scale and measurement tools that calculate real-world dimensions With Concepts, you can: • Drag + drop images + PDF files • Create, store and share vector Object libraries • Export images, vector SVG + PDFs to scale for printing or efficient flow between apps (including Procreate, Sketchbook, AutoCAD and Adobe) • Share directly to email, text, Files, cloud, photos, or your favorite social apps and present with AirPlay or a second screen • Store your work safely in your personal iCloud Drive FREE FEATURES • Infinite canvas • A selection of paper, grid types & tools to get you started • The full COPIC color spectrum, RGB and HSL color wheels • Five layers • Unlimited drawings • JPG exports PAID FEATURES Subscription: • 200+ brush and Object libraries, features, and services • Enjoy Team Sharing for smooth collaboration, including live-sharing of object libraries, color palettes & brushes, with new updates arriving all the time • Unlocks everything across platforms • TRY PREMIUM FREE FOR 7 DAYS One-time-purchases: • Buy the Essentials for life and unlock selection & editing tools, infinite layers, shape guides, custom brushes, custom grids, and exports to PNG / PSD / SVG / DXF. • Pay for advanced features as you need them – object packs & professional brushes are sold separately • Limited to the platform you purchase on Terms & Conditions: • Monthly and yearly subscription payments are charged to your iTunes account at the time of purchase. • Your plan will renew automatically at the end of the billing period unless canceled 24 hours before the billing period ends. • You can cancel or make changes to your subscription at any time in your iTunes Account settings. • Unused portions of any free trial period are forfeited if you make changes to your subscription. We’re dedicated to quality and update frequently based on your feedback. Your experience matters to us. Chat with us in-app via Ask Us Anything, email us at concepts@tophatch.com, or find us anywhere with @ConceptsApp. COPIC is the trademark of Too Corporation. Many thanks to Lasse Pekkala and Osama Elfar for the cover art!

About

Cadmio

Easily create interactive 3D presentations of your product designs. Import common CAD file formats and utilize a library of materials and environments. Share your visualizations with clients who don't need specialized software to review them.

Highlights
  • Import .STEP, .STL, .OBJ files
  • Customizable material and environment presets
  • Interactive 3D presentation editing
  • AR view
  • Shareable proprietary file format
  • Automatic turntable animation
Read full description

CAD visualization has never been easier! Create interactive 3D presentations of your designs, and get your clients round. Use Cadmio’s curated material and environment presets, our presentation editing tools, and improve the ideation process even without prior computer graphics experience. Download Cadmio and get access to all FEATURES including: - .STEP, .STL, or .OBJ import from any CAD app. - Constantly growing Catalog of customizable material and environment presets. - Compact proprietary file format which is easy to share and store locally. - Various editing tools to customize the transform parameters of your CAD file. - Object hierarchy panel. - Multiple selection modes to speed up the preparation process. - Different render modes, units, and dimensions overlay for model evaluation. - Stored camera views and automatic turntable animation. - Projected decal rendering. - AR view. - Share functions. We offer a 1-WEEK TRIAL FOR FREE with unrestricted access to all materials, environments, and presentation editing tools. Prepare interactive 3D presentations on your iPad, and review them on your iPad or iPhone. Send iterations of the design to your client or supervisor, so they don’t need any modelling software to inspect the 3D model. Reviewing .cadmio files doesn’t require a subscription, and the Cadmio Viewer for the iPhone is also available for free. You can find more information about how to GET STARTED with Cadmio on our website: https://www.cadmio.io/getting-started SYSTEM REQUIREMENTS We recommend using iPad Pro with 4+ GB RAM (4th and 5th generation). On devices with less than 4 GB memory (for example the 8th generation iPad) certain environments are disabled. Cadmio supports the .STEP, .STL, and .OBJ file formats for importing CAD models. GET IN TOUCH Feel free to contact us with any questions or feedback at hello@cadmio.io. Follow us on Instagram (@cadmioapp) for more CAD visualization content and updates. SUBSCRIPTION INFORMATION Opening and viewing existing presentations are FREE. Creating and editing presentations requires a subscription. You can choose a monthly or yearly option, each comes with a 1-week free trial. After confirmation, payment will be charged to your iTunes Account at the end of the trial. The subscription will automatically renew unless you turn off auto-renew in the iTunes Account Settings at least 24 hours before the end of the current period. You can cancel at any time and enjoy all subscription benefits during the remaining period. PRIVACY AND TERMS OF USE https://www.cadmio.io/privacy https://www.cadmio.io/terms

Screenshots

Concepts4 screens

Verdict

The call

The clearest difference is monetization model: Concepts at free with in-app purchases against Cadmio's subscription. Concepts also leads on rating (4.7 vs 4.2) and ratings volume (26K vs 34). On price, ads, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Concepts sells 13 in-app purchases, starting at $4.99 per month and Cadmio sells 2 in-app purchases, starting at $10.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Concepts holds the better App Store score, 4.7 against 4.2. That said, the two scores are not equally well evidenced: Concepts has 26K ratings behind it against 34, so its average is the more settled of the two. Written reviews point the same way: 77% of Concepts's written reviews are positive against 61% of Cadmio's.

UpkeepUpdate frequency

Concepts ships an update fortnightly, Cadmio monthly. The most recent releases landed on September 24, 2026 and June 9, 2026 respectively.

Scorecard7 real differences · 4 level
Concepts versus Cadmio: the parameters behind the verdict, then further details
ParameterConceptsCadmio
PriceFreeFree
Rating4.7 (26K ratings) — better4.2 (34 ratings)
Positive reviews77.1% of reviews — better60.7% of reviews
Number of ratings26K — better34
Update frequencyFortnightly — betterMonthly
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases — betterSubscription
Best chart rank#185 — better—
DevicesiPhone, iPad, iPod — betteriPad
Requires iOS15.0 — better15.6
Further details — not scored
Size258 MB1.5 GB
Age rating4+4+
DeveloperTopHatch, Inc.CADMIO Korlatolt Felelossegu Tarsasag

Customer experience

Concepts

All ratings26,451 ratings
Positive94.3%
Neutral3.0%
Negative2.7%
Written reviews1,909 reviews
Positive77.1%
Neutral8.9%
Negative14.0%

Cadmio

All ratings31 ratings
Positive77.4%
Neutral6.5%
Negative16.1%
Written reviews28 reviews
Positive60.7%
Neutral10.7%
Negative28.6%

Bugs and requests

Concepts

Reported bugs

4 issues
  • Memory issues when working with large, complex drawings
  • Inconsistent behavior of the eraser tool
  • Inaccuracies in the snap-to-grid and measurement tools
  • Exporting issues, such as loss of data or poor quality

Requested features

5 requests
  • Improved text editing and formatting options
  • Better color selection and customization tools
  • Collaboration and real-time sharing features
  • Seamless integration with other design/productivity apps
  • Syncing and backup capabilities across devices

Cadmio

Not enough reviews yet to summarise bugs or requests.

In-app purchases

13 purchases

Concepts

Subscriptions4
  • Everything Monthly$4.991 Month
  • Everything Monthly + Trial7 Days trial$4.991 Month
  • Everything Yearly$29.991 Year
Show 1 more
  • Everything Yearly + Trial7 Days trial$29.991 Year
One-time9
  • Shape Library$1.99
  • Pen Brush Pack$1.99
  • Body Forms$1.99
Show 6 more
  • Make Your Own Objects$3.99
  • Essentials (iPhone Only)$4.99
  • PDF Essentials$4.99
  • Pro Pack [Legacy]$7.99
  • 10 Object Packs$14.99
  • Essentials$39.99
2 purchases

Cadmio

Subscriptions2
  • Cadmio Monthly Subscription7 Days trial$10.991 Month
  • Cadmio Annual Subscription7 Days trial$99.991 Year

Questions

Is Concepts free?
Concepts is free to download, with in-app purchases available.
Is Cadmio free?
Cadmio is free to download, with in-app purchases available.
Which has better reviews, Concepts or Cadmio?
Concepts is rated higher. Concepts averages 4.7 out of 5 from 26K ratings, while Cadmio averages 4.2 from 34 ratings.
Do Concepts or Cadmio have ads?
Neither Concepts nor Cadmio shows ads.
Which is updated more often, Concepts or Cadmio?
Concepts ships an update fortnightly, and Cadmio monthly. Most recently, Concepts was updated on September 24, 2026 and Cadmio on June 9, 2026.

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