# Invent Idea vs Carbon

Invent Idea and Carbon are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Invent Idea ships an update monthly, Carbon every 3 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Invent Idea | Carbon |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/invent-idea/id1618064926/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 84 MB | 70 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Montgomery Innovation Partners and Associates LLC](https://appshunter.io/developer/1618064928) | [Matthew Whitehouse](https://appshunter.io/developer/1890502864) |

## What reviewers say

### Invent Idea

[App page](https://appshunter.io/ios/app/invent-idea/id1618064926)

Explore if your invention idea is unique with a free patent search tool. Access millions of U.S. patents to find similar inventions using keywords. This app empowers everyday inventors with professional-grade tools.

**Highlights:** Free patent search tool, Keyword search for similar inventions, Access to Utility and Design patents, Privacy for invention ideas, Downloadable eBook on patent myths, Customer support

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### Carbon

[App page](https://appshunter.io/ios/app/carbon-copyapp/id6761622923)

**Features:** macOS Compatibility, Apple Wallet, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Invent Idea free?

Invent Idea is free to download, with no in-app purchases.

### Is Carbon free?

Carbon is free to download, with no in-app purchases.

### Do Invent Idea or Carbon have ads?

Neither Invent Idea nor Carbon shows ads.

### Which is updated more often, Invent Idea or Carbon?

Invent Idea ships an update monthly, and Carbon every 3 weeks. Most recently, Invent Idea was updated on November 3, 2026 and Carbon on October 31, 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.*