# Concepts vs I Do Nine

The clearest difference is in-app purchases: I Do Nine at none against Concepts's 13. I Do Nine also leads on update cadence (every 4 days vs fortnightly). Concepts's advantage is chart position (#183 vs unranked) and iOS requirement (15.0 vs 18.6). On price, ads and device support there is nothing between them.

Both are free to download. Concepts sells 13 in-app purchases, starting at $4.99 per month. I Do Nine asks for nothing beyond the download.

Concepts ships an update fortnightly, I Do Nine every 4 days. The most recent releases landed on October 20, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Concepts | I Do Nine |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (27K ratings)](https://appshunter.io/ios/app/concepts/id560586497/reviews)** | — |
| Number of ratings | **27K** | — |
| Positive reviews | 76.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Best chart rank | **#183** | — |
| Size | 267 MB | 111 MB |
| Requires iOS | **15.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [TopHatch, Inc.](https://appshunter.io/developer/560586500) | [Jungju An](https://appshunter.io/developer/1703390078) |

## What reviewers say

### Concepts

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

**Currently charting:** #183 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


### I Do Nine

[App page](https://appshunter.io/ios/app/i-do-nine-tailed-fox/id6749927819)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Concepts free?

Concepts is free to download, with in-app purchases available.

### Is I Do Nine free?

I Do Nine is free to download, with no in-app purchases.

### Do Concepts or I Do Nine have ads?

Neither Concepts nor I Do Nine shows ads.

### Which is updated more often, Concepts or I Do Nine?

Concepts ships an update fortnightly, and I Do Nine every 4 days. Most recently, Concepts was updated on October 20, 2026 and I Do Nine on October 5, 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.*