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精细化管控：支持分批、分级、按需迁移
Grammarly offers many features in its free plan, whereas ProWritingAid offers some basic features in the free plan.
This site is hosted on Fly.io, a US-based infrastructure provider. The database is SQLite, stored on an encrypted persistent volume. Verification emails are sent via Resend. Google Forms is used as one verification option because it allows email confirmation without sending anything to your inbox. The site itself is a simple open-source Flask application. No analytics or tracking scripts are used. DNS and SSL are managed through Cloudflare.