About

Private Apps is a small independent studio that builds single-purpose web apps. Each app runs inside your browser, so your files are processed on your own device.

We take rules and sizes only from official sources and show the link and the date we checked. If something is wrong or out of date, please tell us at sungje5575@gmail.com and we will check it against the source.

Open-source components

The pitch trainer uses only the browser's built-in Web Audio API. The passport photo cropper and the rep counter use Google MediaPipe Tasks (face landmarker, selfie segmenter and pose landmarker), licensed under the Apache License 2.0. A copy of the licence is at /vendor/LICENSE.txt.

The form filler uses pdf-lib (MIT licence, licence text) and the official IRS Form W-9 PDF, a U.S. government work.