Web application planning is a stage that, while it may seem tedious, is sometimes neglected by many, and it is one that can determine the success of a project. This is where you choose between a quick prototype and a solid foundation, and make decisions that affect the cost, schedule and quality of the product. It's worth slowing down: gather functional requirements, think about technology stacks (e.g., React + Node, Django) and realistically estimate the budget - otherwise fixes will come faster than you think. We suggest how to prepare a briefing for developers, how to lay out user stories in Jira and what elements to put in a simple prototype in Figma; this is often a cost-saving measure, not a fad. We discuss practical choices - responsive vs. native apps, information architecture planning, and monetization strategies (subscriptions, freemium, ads) - and point out common pitfalls that can suggest false savings. You'll find ready-made checklists and templates to facilitate communication with the development team and organize the next steps of the work. If you're running an SME and considering a web application, the materials will help you make more informed decisions - you're likely to end up with faster implementation, lower costs and a product that really solves customers' problems.