| Port details on branch 2026Q3 |
- py-fsrs Free Spaced Repetition Scheduler
- 6.3.2 devel
 =0      6.3.2Version of this port present on the latest quarterly branch. - Maintainer: chris.longros@gmail.com
- Port Added: 2026-08-19 14:06:03
- Last Update: 2026-08-19 14:03:10
- Commit Hash: 24c1d82
- Also Listed In: python
- License: MIT
- WWW:
- https://github.com/open-spaced-repetition/py-fsrs
- Description:
- Python implementation of the Free Spaced Repetition Scheduler (FSRS)
algorithm. FSRS uses machine learning to analyze personal review history
and optimize flashcard scheduling intervals, replacing fixed-formula
schedulers like SM-2 with data-driven, individualized memory modeling.
Features:
- Implements FSRS-6 algorithm
- Scheduling, card state management, and retrievability calculation
- Optional optimizer module for computing optimal parameters from review data
- Built into Anki since 23.10, with FSRS-6 support in Anki 25.09
-- Christos Longros <chris.longros@gmail.com>
  ¦  ¦  ¦  ¦ 
- Manual pages:
- FreshPorts has no man page information for this port.
- pkg-plist: as obtained via:
make generate-plist - There is no configure plist information for this port.
- USE_RC_SUBR (Service Scripts)
- no SUBR information found for this port
- Dependency lines:
-
- ${PYTHON_PKGNAMEPREFIX}fsrs>0:devel/py-fsrs@${PY_FLAVOR}
- To install the port:
- cd /usr/ports/devel/py-fsrs/ && make install clean
- To add the package, run one of these commands:
- pkg install devel/py-fsrs
- pkg install py312-fsrs
NOTE: If this package has multiple flavors (see below), then use one of them instead of the name specified above.
NOTE: This is a Python port. Instead of py312-fsrs listed in the above command, you can pick from the names under the Packages section.- PKGNAME: py312-fsrs
- Package flavors (<flavor>: <package>)
- distinfo:
- TIMESTAMP = 1786344073
SHA256 (fsrs-6.3.2.tar.gz) = 7fe79947ceb92ca35fdca3dfa511a239be15b317cde63d6643a2da6110844d91
SIZE (fsrs-6.3.2.tar.gz) = 32766
No package information for this port in our database- Sometimes this happens. Not all ports have packages. Perhaps there is a build error. Check the fallout link:
- Dependencies
- NOTE: FreshPorts displays only information on required and default dependencies. Optional dependencies are not covered.
- Build dependencies:
-
- py312-setuptools>0 : devel/py-setuptools@py312
- py312-wheel>0 : devel/py-wheel@py312
- python3.12 : lang/python312
- py312-build>=0 : devel/py-build@py312
- py312-installer>=0 : devel/py-installer@py312
- Test dependencies:
-
- python3.12 : lang/python312
- Runtime dependencies:
-
- py312-typing-extensions>0 : devel/py-typing-extensions@py312
- python3.12 : lang/python312
- There are no ports dependent upon this port
Configuration Options:- No options to configure
- Options name:
- devel_py-fsrs
- USES:
- python
- FreshPorts was unable to extract/find any pkg message
- Master Sites:
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