Invent Idea vs Carbon
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Invent Idea
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.
- 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
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Have you ever seen an advertisement for a product or seen one selling in stores or online and said, “That product was my idea!”? Then this is the app for you! The Invent Idea App by For Sale By Inventor is geared specifically for everyday inventors to get started on their invention ideas. First time or seasoned inventors can start with our free patent search tool to determine if their invention idea has already been patented. This is an important first step as it can let you know if your idea is unique before spending time and money patenting and developing your invention. The Free Patent Search Tool accesses millions of issued United States Utility and Design Patents. New inventors can simply do a keyword search on the app to bring up the most similar inventions to theirs. The app scours the patent database and shows the user the most similar inventions. This app is geared for normal, everyday people with an invention idea to give them a no cost or obligation way to get started on their invention. Patenting and developing an invention can be costly and time consuming. Whether you are an electrician, plumber, carpenter, stay at home parent, doctor, or lawyer – this app was created for you! Becoming an inventor does not discriminate if you are male, female, young, or old. All you need is an idea, and this free patent search tool is the perfect way to start. Finally, the Invent Idea App by For Sale By Inventor gives everyday inventors tools that were once only available to industry insiders and professionals. Features: Patent Search Tool: Easy keyword search tool that delivers the most similar patents to the keyword terms entered Utility AND Design Patents: The Patent Search tool will provide results for both Utility Patents (How it Works) and Design Patents (What it Looks Like) Privacy: The information entered is not shared with any 3rd party so you can trust that your invention idea will be kept confidentially Education: Download the free eBook Patent Myths Exposed to learn more about protecting, developing, and selling your inventions Customer Support: The Invent Idea App is backed by For Sale By Inventor and their team is available to assist with any issues you may have with the app.
Carbon
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Welcome to Carbon Copy App – the ultimate app designed to make your life easier and more productive. With Carbon Copy, you can: • Sign in securely and manage your business account • Create and update client records with contact and address details • Manage projects and connect them with client information • Create, edit, and track worksheets • Upload documents, attach files, and capture worksheet photos • Generate and open PDF documents inside the app • Send documents by email when needed • View invoice-related records and payment history • Purchase worksheet credits through a secure web-based payment flow Carbon Copy is built for businesses that need a practical way to handle project and worksheet workflows while keeping important records accessible on the go. Whether you are managing customer details, job documents, or invoice-related activity, the app helps keep your workflow organized and easy to access. Some features may depend on your account type, device permissions, or internet connectivity. Key Features: Easy-to-use interface Fast and reliable performance Secure and safe usage Regular updates with new features Why choose us? We focus on delivering the best experience with continuous improvements based on user feedback. Download now and experience the difference with Carbon Copy App!
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Invent Idea | Carbon |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Monthly | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 84 MB | 70 MB |
| Age rating | 4+ | 4+ |
| Developer | Montgomery Innovation Partners and Associates LLC | Matthew Whitehouse |
In-app purchases
Invent Idea
No in-app purchases
Carbon
No in-app purchases






