# Concepts vs Cadmio

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.

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.

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.

Concepts ships an update fortnightly, Cadmio monthly. The most recent releases landed on September 25, 2026 and June 9, 2026 respectively.

## The numbers

| Metric | Concepts | Cadmio |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (26K ratings)](https://appshunter.io/ios/app/concepts/id560586497/reviews)** | [4.2 (34 ratings)](https://appshunter.io/ios/app/cadmio-cad-visualization/id1546213629/reviews) |
| Number of ratings | **26K** | 34 |
| Positive reviews | **77.1% of reviews** | 60.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | **Free with in-app purchases** | Subscription |
| Best chart rank | **#192** | — |
| Size | 258 MB | 1.5 GB |
| Requires iOS | **15.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [TopHatch, Inc.](https://appshunter.io/developer/560586500) | [CADMIO Korlatolt Felelossegu Tarsasag](https://appshunter.io/developer/1546213631) |

## What reviewers say

### Concepts

[App page](https://appshunter.io/ios/app/concepts/id560586497)

**Currently charting:** #192 Top Free · Graphics & Design (US App Store)

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:** Family Sharing

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Everything Monthly | $4.99 | per month |
| Everything Monthly + Trial | $4.99 | per month |
| Everything Yearly | $29.99 | per year |
| Everything Yearly + Trial | $29.99 | per year |
| Shape Library | $1.99 | one-time |
| Pen Brush Pack | $1.99 | one-time |
| Body Forms | $1.99 | one-time |
| Make Your Own Objects | $3.99 | one-time |
| Essentials (iPhone Only) | $4.99 | one-time |
| PDF Essentials | $4.99 | one-time |
| Pro Pack  Legacy | $7.99 | one-time |
| 10 Object Packs | $14.99 | one-time |
| Essentials | $39.99 | one-time |

**What reviewers like**

- 🚀 Infinite canvas
- 👍 Intuitive and customizable interface
- 🎨 Powerful drawing and sketching tools
- 💡 Versatile for various use cases (architecture, design, note-taking)
- 🔒 Responsive customer support

**What reviewers complain about**

- 🐛 Occasional crashes and bugs
- 🔍 Steep learning curve for some users
- 💰 Subscription model can be expensive for casual users
- 🔧 Limited text handling and editing capabilities
- 🔀 Inconsistent behavior of certain tools (e.g., eraser, alignment)

**Reported bugs**

- 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**

- 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

[App page](https://appshunter.io/ios/app/cadmio-cad-visualization/id1546213629)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cadmio Monthly Subscription | $10.99 | per month |
| Cadmio Annual Subscription | $99.99 | per year |


## Frequently asked 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 25, 2026 and Cadmio on June 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*