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fsrs
v6.6.1 StableFSRS for Rust, including Optimizer and Scheduler
BSD-3-Clause Edition 2024
Quick Verdict
- ✓Actively maintained (updated 34d ago)
- ✓Stable API (6.x for 2+ years)
- ✓Team maintained (2 owners)
Security
Checking security advisories...
Downloads
330.5K
Dependents
29
Releases
73
Size
126KB
Deep Insights
📊
Steady growth
19.4K downloads in the last 30 days (648/day), up 20% from the previous period.
👥
Team maintained
This crate is maintained by a team (2 owners), reducing bus-factor risk and ensuring continuity.
✅
Stable for 2+ years
The API has been stable (1.x) for over 2 years with 73 releases. This level of maturity means you can depend on it without worrying about breaking changes.
🌟
Used by top crates
Notable dependents include ssr-algorithms, flashy, mem-yaml, kbsr, melete. When high-quality crates choose fsrs, it's a strong quality signal.
Health Breakdown
Maintenance 17/25
Recency, release consistency, active ratio
Quality 17/25
Yanked ratio, deps, size, maturity, features
Community 15/20
Reverse deps, ownership, ecosystem
Popularity 7/15
Downloads, momentum, growth trend
Documentation 10/15
Docs, repo, license, metadata
Download Trend
Daily downloads · last 90 days
480/day avg+23%
Top Dependents
Most downloaded crates that depend on fsrs
Version Adoption
v5.2.0
90%
v6.6.1
9%
v6.6.0
1%
v6.1.0
0%
v6.4.1
0%
Release Timeline
10 releasessince 2025
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2026
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LessMore
Feature Flags
experimental_cost_adr
README
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Maintainers
Dependencies
17
direct dependencies
Dependents
29
crates depend on fsrs