Fossify Paint – Open‑Source Android Drawing App

Fossify Paint is a fully open‑source Android sketching app that offers a versatile canvas, powerful drawing tools, and exportable file formats—all with a strong focus on privacy and developer customization.
With a clean, user‑friendly interface, users can instantly begin sketching using adjustable brush sizes, color pickers supporting hex codes, and customizable canvas backgrounds. Its privacy‑centric design ensures the app works entirely offline, without requiring intrusive permissions, making it ideal for users who prioritize data security. Available under the GPL‑3.0 license, Fossify Paint invites developers to explore, contribute to, and customize a codebase written mainly in Kotlin and built with Gradle Kotlin DSL. The project’s Changelog highlights version 1.1.0 released on May 5, 2025, which added a disable‑zoom‑based‑brush‑size option, updated translations, and aligned the minimum eraser size with the brush size. With over 150 GitHub stars, dozens of forks, and an active community addressing eight open issues (including feature requests like canvas rotation and two‑finger undo), it’s a thriving project for open‑source enthusiasts.
Developers can contribute via GitHub by forking the repo, submitting pull requests, and following the CONTRIBUTING guidelines. The app’s Gradle configuration ensures easy building and packaging, while the CONTRIBUTING file provides clear instructions to streamline collaboration .
For users, the app supports exporting creations in PNG, JPG, and SVG formats, bridging casual doodling and vector graphics workflows. The app is available on Google Play, F‑Droid, and IzzyOnDroid, ensuring wide distribution of the APK.