Privacy-first apps, plugins, and tools

I build apps and tools that solve real problems without the usual junk.

Stealthy Apps is where I ship practical software one product at a time. No tracking, no forced accounts, no bloated setup, and no filler just to look bigger than it is.

What you get

Plain rules behind every project.

  • Keep private data local whenever the tool can work that way.
  • No analytics, telemetry, or forced sign-up just to try something.
  • Only ask for the permissions the job actually needs.
  • Keep the free version genuinely useful, not a glorified demo.

Apps

Current lineup.

FillPro is the first public product here. New releases show up when they are ready to use, support, and stand behind.

FillPro

Private form autofill for Chrome, Edge, and Firefox. Save your profile once, fill normal web forms faster, and keep passwords, payment fields, and one-time codes out of scope by design.

Open FillPro page →

Need a better tool?

If there is an app, extension, plugin, or workflow tool you wish existed, tell me. The best ideas usually come from a real annoyance that still does not have a clean solution.

Send me a note →

Common questions

Quick answers.

Who built this?

Just me, Karl. No team and no investors. I build one thing at a time and publish what is ready, not what only looks ready.

Where does my data go?

Nowhere by default. These tools are designed to keep your data on your device whenever possible. I do not run servers to hold user data, which keeps things simpler, cheaper, and better for privacy.

How does this stay sustainable?

Optional paid upgrades. Free should be useful on its own. When a product has Pro, it pays for ongoing work while keeping the product simple and respectful to use.

Can I request features?

Yes. The contact page is the right place. I read the messages myself and use them to decide what deserves to be built next.