For Ruby folks — I’ve forked the FSRS gem to fix an issue where new cards were being spaced 60 days apart instead of 60 seconds: https://github.com/arvindang/r

For Ruby folks — I’ve forked the FSRS gem to fix an issue where new cards were being spaced 60 days apart instead of 60 seconds: https://github.com/arvindang/rb-fsrs https://github.com/arvindang/rb-fsrs Originally adapted from the Python version linked here.