Quoc.app is the public home for software built and maintained by Nguyễn Đình Quốc. There is no company shell here — just one person making useful tools, products and experiments, then supporting the ones that remain useful.

What I build

  • Products with a clear job, their own site and their own support path.
  • Tools that remove a small piece of friction from everyday work.
  • Notes about building software, systems and a more deliberate way to work.

How I work

  • Local-first when it makes sense.
  • No fake promises about privacy, storage or product status.
  • Each product documents its own data practices and policies.
  • Direct support instead of a maze of forms and help desks.

Find your way around

  • Products — public products that are actively maintained.
  • Notes — writing and technical notes.
  • Support — contact and product support paths.