Is Fushi free?

Yes. Fushi is open source under the GPLv3 licence. Every feature is free — no in-app purchases, subscriptions or paid unlocks. The code is public on GitHub, so you can audit it and build it yourself.

The only thing that may cost money is the optional AI features: Fushi doesn't provide an AI service, it uses the provider you configure under Settings → Models → LLM, and that provider bills you (a model running on your own machine works too). Not using AI doesn't affect anything else — see What is AI download?.

If it helps you, consider supporting development, distribution and maintenance through GitHub Sponsors.