# Unthinkable > Unthinkable is an iOS app that surfaces business opportunities from real demand signals across the web, scored and analysed so founders can find underserved markets instead of guessing. Unthinkable turns signals of unmet demand into concrete, explorable business opportunities. Each opportunity is scored and analysed, so founders can judge whether a market is worth pursuing rather than starting from a blank page. Alongside the opportunity feed, the app can search any location for underserved categories using real location data, and an AI advisor helps turn a chosen opportunity into an MVP plan and a launch sequence. ## Product - [Live Opportunity Feed](https://unthinkableapp.com): a continuously updated feed of business opportunities built from demand signals across the web, each scored and analysed. - [Global Opportunity Finder](https://unthinkableapp.com): search any city or region and see which business categories are underserved there, using real location data. - [AI Advisor](https://unthinkableapp.com): an assistant with the full context of an opportunity, used to map an MVP, plan a launch and break down the relevant metrics. ## Blog - [How to Test a Business Idea With No Money](https://unthinkableapp.com/blog/test-business-idea-no-money): Learn how to test a business idea with no money. A ranked list of validation methods starting at zero dollars to find real purchase intent and users. - [Why Taken Business Ideas Are Better to Build](https://unthinkableapp.com/blog/taken-business-ideas-better): Discover why a taken business idea is actually a competitive advantage. Learn how to identify market gaps, attack tech debt, and win against incumbents. - [How to research competitors before starting a business](https://unthinkableapp.com/blog/research-competitors-before-starting-business): Learn how to extract pricing models, review volumes, and demand signals from competitors to validate your business idea before writing any code. - [Why Most Startup Ideas Fail Before Writing A Line Of Code](https://unthinkableapp.com/blog/why-most-startup-ideas-fail): Startups fail due to no demand, the wrong buyer, or poor distribution. Learn why demand is the only factor you can verify before building your product. - [How to Find a Defensible Niche for a Small Business](https://unthinkableapp.com/blog/find-defensible-niche-small-business): Finding a niche is a strict search process. Learn how to use demand signals, workflow constraints, and real arithmetic to find defensible markets. - [Choose Between an App or Website Based on Distribution](https://unthinkableapp.com/blog/build-app-website-first-distribution): Stop choosing between an app and a website based on coding preference. Learn how to let user distribution and search volume dictate your platform choice. - [Signs a Business Idea is Already Saturated](https://unthinkableapp.com/blog/signs-business-idea-already-saturated): A high competitor count does not mean a market is saturated. Learn the five mathematical tests to distinguish a crowded market from a dead one. - [How To Size A Market Using Public Data And Basic Math](https://unthinkableapp.com/blog/size-market-public-data-math): Learn how to calculate market size from the bottom up using public data, competitor reviews, and basic math. Stop relying on expensive top-down reports. - [How To Run A Fake Door Test For Your Next Software Product](https://unthinkableapp.com/blog/how-to-run-fake-door-test): Learn how to build a fake door landing page, calculate the exact traffic you need, and measure the only metric that proves real market demand. - [How Many Customer Interviews to Conduct Before Building](https://unthinkableapp.com/blog/customer-interviews-building): Discover exactly how many customer interviews you need before writing code, which questions ruin your data, and the math behind a validated idea. - [Find Underserved Local Markets With Data](https://unthinkableapp.com/blog/find-underserved-local-markets): Learn how to calculate local market gaps using population per venue, drive-time isochrones, competitor age, and public demand signals in your city. - [Mining App Store Reviews for Product Ideas](https://unthinkableapp.com/blog/read-app-store-reviews-product-ideas): Learn a concrete method to extract profitable product ideas from App Store reviews. Use one-star and three-star demand signals to find market gaps. - [How to find a problem worth solving in public data](https://unthinkableapp.com/blog/find-problem-worth-solving-public-data): Stop brainstorming. Learn how to find profitable business ideas by reading public demand signals in support threads, feature requests and one-star reviews. - [How To Tell If A Business Idea Has Real Demand](https://unthinkableapp.com/blog/tell-business-idea-real-demand): Stop asking friends if they like your app idea. Learn how to identify real demand signals, find bad workarounds, and validate ideas before building. - [Validate a business idea in four steps, cheapest first](https://unthinkableapp.com/blog/validate-business-idea-before-building): The four validation steps in cost order: keyword volume, forum reading, five customer calls, a $200 fake door. With the arithmetic worked through for each. - [TAM SAM SOM for Founders: Defensible Market Sizing](https://unthinkableapp.com/blog/tam-sam-som): Unlock the power of TAM, SAM, and SOM to effectively size your market and impress investors with your pitch deck strategies. - [How to Find an Underserved Market Before You Build](https://unthinkableapp.com/blog/find-underserved-markets): Find an underserved market by tracking workarounds, price gaps and segment gaps. A one week research plan, the signals that matter, and the traps to avoid. - [Fake Door Test: Validate Demand Before You Build](https://unthinkableapp.com/blog/fake-door-test): Learn how to validate demand with a fake door test. Discover actionable steps to gauge interest before building new features. ## Pages - [Home](https://unthinkableapp.com): product overview and download links. - [About](https://unthinkableapp.com/about): what Unthinkable is and who builds it. - [Blog](https://unthinkableapp.com/blog): articles on finding, sizing and validating business opportunities. - [Contact](https://unthinkableapp.com/contact): how to get in touch. - [Manage Subscription](https://unthinkableapp.com/manage-subscription): how to view or cancel a subscription. ## Legal - [Privacy Policy](https://unthinkableapp.com/privacy): what data is collected, how it is used, retained and deleted, and the rights that apply. - [Terms of Service](https://unthinkableapp.com/terms): the terms covering use of the app and site, purchases and subscriptions. ## Get the app - [Unthinkable on the App Store](https://apps.apple.com/app/id6781935024): free download, iOS.