FsrsSharp 5.1.3

.NET 9.0 This package targets .NET 9.0. The package is compatible with this framework or higher. 
dotnet add package FsrsSharp --version 5.1.3
                    


                    

                
NuGet\Install-Package FsrsSharp -Version 5.1.3
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="FsrsSharp" Version="5.1.3" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="FsrsSharp" Version="5.1.3" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="FsrsSharp" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add FsrsSharp --version 5.1.3
                    


                    

                
#r "nuget: FsrsSharp, 5.1.3"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package FsrsSharp@5.1.3
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=FsrsSharp&version=5.1.3
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=FsrsSharp&version=5.1.3
                    


                            Install as a Cake Tool

FsrsSharp

FsrsSharp is a C# port of the FSRS spaced repetition scheduler, based on the py-fsrs 5.1.3 implementation.

The goal is API and data-model compatibility with the Python library, not a C#-specific redesign. Card and review log objects can be converted to dictionaries for straightforward JSON serialization and interchange with Python tooling.

Install

dotnet add package FsrsSharp

Usage

using FsrsSharp;

var scheduler = new Scheduler(enableFuzzing: false);
var card = new Card();

var result = scheduler.ReviewCard(card, Rating.Good, DateTimeOffset.UtcNow);

Card updatedCard = result.UpdatedCard;
ReviewLog log = result.Log;

Notes

  • Review timestamps must be in UTC.
  • Large behavioral differences from py-fsrs should be treated as bugs.
Product Compatible and additional computed target framework versions.
.NET net9.0 is compatible.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 was computed.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

  • net9.0

    • No dependencies.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last Updated
5.1.3 97 3/25/2026
1.0.0 198 10/26/2025

Initial NuGet packaging release for the FsrsSharp library.