Skipping the prototype is the most expensive mistake a startup can make. We have watched founders spend six months and millions of Naira building a full product, only to discover that their core assumption was wrong. A prototype would have surfaced that in two weeks.
A prototype is not a finished product. It is a question in physical form. Does this flow make sense? Will users understand this navigation? Is this feature actually the one people care about? The goal is to get answers, not to ship something polished.
Test with real users, not friends and family. Your inner circle will tell you what you want to hear. Put your prototype in front of five strangers who match your target audience. Watch them use it silently. The confusion on their faces will teach you more than any feedback form.
Build the minimum that tests your riskiest assumption. If your startup depends on users uploading photos, prototype the upload flow. If it depends on a marketplace dynamic, prototype the buyer-seller interaction. Do not waste time prototyping features that do not validate your core bet.
The cost of prototyping is a fraction of the cost of building wrong. A two-week prototype sprint might cost 5% of a full build. But it can save you from building something nobody wants. That is not an expense. That is the cheapest insurance you will ever buy.