1-Click Anki Desktop Sync &
FSRS Retention Optimizer
Zero manual .apkg export headaches. Connect directly to Anki Desktop via the Penziv Sync Add-on or 6-digit sync code to audit True Retention, eliminate leeches, and optimize FSRS settings—100% privately in your browser.
1-Click Direct Anki Desktop Sync
Connect directly to Anki Desktop in 1 click or paste your 6-digit sync code below to launch instant analytics.
Get the official lightweight Penziv Sync Add-on package for your native Anki client.
In Anki desktop:
Tools ➔ Add-ons ➔ Install from file...
penziv-sync.ankiaddonRestart Anki and press the sync shortcut to stream stats instantly:
Scientifically Built for High-Stakes Exams
Go beyond basic review counters. Penziv models memory stability, sibling interference, and review load curves to give you maximum exam recall in minimum time.
1-Click Add-on Sync
Stream analytics directly from Anki Desktop without exporting large .apkg files every time you want to see your progress.
FSRS Retention Tuning
Find the exact mathematical sweet spot between desired recall and review workload to save 15-30+ minutes every single day.
Leech Lifeboat Protocol
Triage cards with 8+ lapses that break the minimum information principle. Reformat them or convert them to USMLE questions.
Exam Workload Forecast
Predict review volume spikes leading up to your USMLE Step 1, Step 2 CK, or Shelf exam dates to prevent study backlogs.
Frequently Asked Questions
Frequently Asked Questions & Security
Everything you need to know about 1-Click Anki Desktop Sync, FSRS retention math, and zero-export privacy.