Because there is no official desktop port, developers in the community created "spiritual successors" and fan apps to bring the Flipnote workflow to Windows, Mac, and Linux:

Developed by Nintendo EAD Tokyo and released for the Nintendo DSi in 2008-2009, Flipnote Studio was a free animation tool designed to replicate the simplicity of drawing on a physical flipbook. It became an instant hit, allowing millions to create frame-by-frame animations with a stylus and basic tools. When official online services like shut down in 2013, a passionate community began looking for ways to keep the experience alive on modern hardware. Fan-Made PC & Mac Versions

Often described as "Flipnote Studio for PC," this is a free, basic animation software designed to mimic the DSi's interface and feel. It is available on Itch.io and can run on Linux or Mac using Wine .

A more modern, browser-based alternative that offers a simple interface similar to Flipnote, including pixelated brush patterns and audio support, making it accessible on any PC without installation. Modern Alternatives