AI Sentence Training · Multilingual Gym
Sentence
Gymnasium
Sentence Gym · Drill every sentence until it's instinct
AI generates the questions, AI grades the answers, and every question is pooled for reuse. Translation, paraphrase, and grammar drills — three modes, one closed loop.
Three Training Modes
One gym, three ways to train
Each mode runs the full loop — generate, answer, judge, feedback. Pick one to start, or alternate between all three.
Bidirectional translation across 4 language pairs: ja-en / en-ja / zh-ja / zh-en.
Enter 02RewriteRewriteSource in Japanese or English — rephrase it while keeping the meaning. AI scores fidelity and naturalness.
Enter 03DrillsDrillsFill-in-the-blank, multiple choice, and error correction keyed to grammar points. Focus on te-form, present-perfect, and more.
EnterWorkflow
One complete training loop
Four steps from question to feedback make each session reviewable. Questions are pooled and reused — the more you train, the faster it gets.
- 01
Generate
AI composes
AI generates the question and pools it. Matching dimensions are reused first — the more you train, the faster it gets.
- 02
Answer
You respond
Translate, paraphrase, or choose — then submit your answer.
- 03
Judge
AI evaluates
AI compares your answer to the reference and returns correct or incorrect.
- 04
Feedback
Review & record
Explanation, suggestions, and example sentences — saved to your history and stats.
Pricing
Simple, transparent pricing
Every new user starts with 20 free Credits. Each training question costs 1 Credit, and additional packs are priced clearly below.
20 Credits
Free
Included for new users
100 Credits
$2.99
100 credits
500 Credits
$12.99
500 credits
1500 Credits
$29.99
1500 credits
Stop Studying. Start Training.
Free 20 Credits to start · No credit card required, pay-as-you-go afterwards