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UseOneApp for developers

Track project scope and invoice milestones without the overhead.

As an independent developer you want to write code, not wrestle with admin tools. UseOneApp gives you just enough structure — projects, files, milestone invoices — without the bloat of enterprise software.

Projects without the bloat

Track tasks and scope per client, with a client portal for files and notes.

Invoice milestones cleanly

Bill per milestone with clean, sequential numbering handled for you.

Bring your own AI key

On the Pro plan, connect your own AI provider key — no markup, no lock-in.

Stop juggling browser tabs

UseOneApp creates the invoice, tracks the due date and keeps it next to the client — all in one place. Free forever for one project.

Try it free →

See also: guides for freelancers.

UseOneApp for: freelancers · designers · photographers · consultants · tradespeople