What’s the best way to turn a consumer app idea into a first prototype?

Define a minimum viable product first: the smallest set of features that proves the core idea. For this app, that might only include creating a group, adding an expense, splitting it, and seeing who owes what. You can learn the skills needed to build that yourself, use a builder, or bring in a developer. If you hire someone, make sure you can get advice from a technically experienced person you trust so the project scope and timeline are realistic.

Realistically, there are two main paths: learn how to build it or work with someone who already can. A no-code tool may be a good middle ground for validating the idea, but a full product still requires decisions about design, data, security, and maintenance. Before paying a developer, write down the exact user flow and limit the first release to the core problem you’re trying to solve.

Start with the simplest version that can test whether people actually want it. That could be a shared spreadsheet or a rough no-code prototype. The biggest risk is spending months learning tools and building polished features before confirming that anyone cares. If people use the basic version and point out what’s frustrating, you’ll have much better direction for what to improve next.