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Waifu2x-Extension-GUI vs Flowframes: catalog facts
Waifu2x-Extension-GUI	Flowframes
Freemium Free for personal use under the project licence. Commercial use requires the paid Premium…	Freemium Older builds are free on itch.io; the latest builds are for Patreon supporters.
Windows	Windows
It bundles several upscaling and frame-interpolation engines behind one Windows interface and works with AMD, Intel and…	Graphical interface for RIFE and DAIN interpolation Supports both CUDA and NCNN backends
The licence permits personal use only, so commercial use requires buying the Premium build, and the code is…	Windows only Latest builds require Patreon support
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.