Open Source Licenses

Floww is built with amazing open-source technologies. We're grateful to the developers and communities who make these tools freely available.

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FSRS Algorithm

Floww uses the FSRS (Free Spaced Repetition Scheduler) algorithm to power our intelligent spaced repetition system. FSRS is developed by Jarrett Ye and contributors at the open-spaced-repetition organization.

What FSRS Does in Floww:

  • • Calculates optimal review intervals for your flashcards
  • • Adapts to your individual memory retention patterns
  • • Uses parameters like retention rate, difficulty, and stability
  • • Continuously optimizes based on your study performance
  • • Implements self-supervised learning for personalized scheduling
GitHub Repository →Learn About FSRS →

MIT License

MIT License

Copyright (c) 2022 Jarrett Ye and open-spaced-repetition contributors

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

Other Open Source Technologies

Next.js

React framework for production-grade applications

License: MIT |GitHub

React

JavaScript library for building user interfaces

License: MIT |GitHub

Tailwind CSS

Utility-first CSS framework for styling

License: MIT |GitHub

Framer Motion

Animation library for React applications

License: MIT |GitHub

Radix UI

Low-level UI primitives for accessibility

License: MIT |GitHub

TypeScript

Typed superset of JavaScript for better development

License: Apache 2.0 |GitHub

Acknowledgments

We're deeply grateful to the open-source community and all the developers who contribute to these amazing projects. Special thanks to:

  • • Jarrett Ye and the open-spaced-repetition team for the FSRS algorithm
  • • The React and Next.js teams for the development framework
  • • The broader open-source community for making innovation accessible

If you have questions about our use of any open-source technologies or licensing, please contact us.

Legal Compliance

This page fulfills our obligation to provide attribution and license information for open-source software used in Floww. All licenses are respected and followed according to their terms.