Software requirements turn an app idea into concrete capabilities and constraints. They state what stakeholders need, while avoiding implementation details such as specific widgets or technologies. section 3.0 section 3.3
Useful requirements:
- Express a capability the app should provide. section 3.3
- Describe user and stakeholder needs rather than implementation choices. section 3.3
- Define both what the app will do and what remains out of scope. section 3.3.1
- Scale the detail to the project: a small app may need only a short bullet list. section 3.1
Unit converter requirements
A unit converter can require numeric input, a source and compatible destination unit, displayed converted output, imperial and metric conversions, cross-system conversions, and straightforward addition of units. Currency conversion stays out of scope because changing exchange rates add API complexity. section 3.3 section 3.3.1
The six-step workflow places requirements between stating the concept and visualizing the user experience, then continues through implementation and iteration. section 3.1
