Beginning with selecting an appropriate platform approach for a desktop app—native options (Windows/macOS/Linux), cross‑platform tools, and how it will be distributed. A clearly defined MVP and an early mock-up help verify workflows, performance requirements, and the overall user experience on real devices.

As the product evolves, stability, updates, and packaging matter more. Careful management of file systems, permissions, offline capabilities, and integrations (device APIs, peripherals, enterprise authentication) ensures daily reliability, while an update system and crash analytics ease ongoing support.