Tell us the real situation first. We will use it to make the review fit the reader and your goal.
Your review context
Auto chooses register from Situation + Reader only. Goal does not change the register.
Quick style
Fine-tune style
Advanced. Precision, register, native-like phrasing.
Your rewrite target stays C1-ready; this level only adjusts how feedback is explained.
The reviewer uses this language to explain corrections. The corrected English, natural version, and C1 version stay in English. The default comes from Settings.
Effective mode: Quick Fix (1 phrase) — For a single short phrase. No CEFR estimate, just a corrected and natural version.
Note: target level has limited effect for ultra-short Quick Fix (input is too short for a level-specific rewrite). Differences across A1/B1/C1 are most visible in Sentence Review and Full Review.