Show HN: Gander, an Android file viewer that asks for no permissions at all | Hacker News

An Android developer released Gander, a 14 MB file viewer.

It opens PDFs, modern Office files, images, video, audio, Markdown, and code, but it is view-only.

The app asks for no permissions at all, including no internet access, and renders files locally on-device.

It supports modern Office formats, not legacy .doc or .ppt, and is built with local libraries like Pdfium, Media3, and WebView.

Gander is open source under the MIT license and available via GitHub Releases as a privacy-focused alternative to cloud-backed viewers.