Building a desktop app begins by selecting an appropriate platform approach: native across Windows, macOS, and Linux, cross-platform tools, and how it's distributed. A clearly defined MVP and an initial prototype aid in verifying workflows, performance requirements, and the overall user experience on actual devices.

As the product evolves, reliability, updates, and packaging take center stage. Thoughtful management of file systems, permissions, offline capability, and integrations (device APIs, peripherals, enterprise authentication) helps ensure dependable everyday use, while a robust update system and crash reports ease ongoing maintenance.