Choose the plan that fits your learning
Start free with up to 500 questions a day. Upgrade to Pro for unlimited practice and deeper insights.
Free
Everything you need to start your adaptive Japanese learning journey.
- ✓Up to 500 questions per day
- ✓Overall ability score tracking
- ✓Activity history and progress overview
- ✓3 fixed practice difficulty levels
- ✓Thousands of JLPT-aligned practice questions
Pro
For serious learners who want maximum control and insight into their progress.
- ✓Everything in Free
- ✓Unlimited daily practice
- ✓Error book with review practice
- ✓Separate scores for vocabulary, grammar, reading, and listening
- ✓Questions matched to your level in each category
- ✓Precise difficulty adjustment to your exact level
- ✓Custom question count
- ✓Detailed trend charts for each question type
Compare plans
| Feature | Free | Pro |
|---|---|---|
| Daily study cards | Up to 500 cards/day | Unlimited |
| Daily practice questions | Up to 500/day | Unlimited |
| Overall ability score | ✓ | ✓ |
| Scores by question type | — | ✓ |
| Error book review | — | ✓ |
| Question matching | Matched only by overall ability score, less precise | Matched by each question type |
| Questions per session | 5, 10, or 15 | Custom |
| Difficulty control | 3 preset levels | Precise slider adjustment |
| Statistics | Basic overview | Detailed trends by question type |
Frequently asked questions
Pro gives you a complete picture of your Japanese ability by breaking down your scores into vocabulary, grammar, reading, and listening. Instead of one-size-fits-all question matching, Pro matches each question type to your exact level — so practice always feels right, never too easy or too hard. You also get precise difficulty control, an error book to review your mistakes, custom session lengths, and detailed trend charts so you can see exactly where you're improving.
Yes, you can cancel at any time. Your Pro access will continue until the end of your current billing period — you won't lose any access you've already paid for.
If you subscribe to Pro, you get a 15-day free trial. You can cancel anytime before the trial ends.
We don't offer this option right now. If you need it, contact mail@kotobaiplus1.com.
Please contact mail@kotobaiplus1.com.