Gander: Secure File Viewing on Android

Gander is a lightweight Android app designed for local file viewing. It works completely offline and does not require additional device permissions.

The utility supports a wide range of document and media formats, including PDF, Word, Excel, PowerPoint, ODT, RTF, ZIP, STL, as well as images, videos, and audio files.

• PDF, Word, Excel, PowerPoint
• ODT, RTF, ZIP, STL
• Photos, video, audio
• Markdown and source code

The app is developed in JavaScript and distributed as open-source software. Its key features include the absence of ads, built-in tracking, and user activity monitoring systems, ensuring complete privacy.

The project's source code is available for study and modification on GitHub.